Fix test suite.

Explanations:
-------------
test/parallel/test-cluster-message.js: add `family: 4` to `connect` because without it will default to `localhost` which could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/parallel/test-http-localaddress.js: add `family: 4,` to `connect` because `localhost` could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/parallel/test-http-upgrade-client.js: add `family: 4,` to `http.get` because `http.get` without specified host uses `localhost` which could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/parallel/test-http2-connect-options.js: add `family: 4` to `http2.connect` `options` because `localhost` might resolve to `::1` if IPv6 is available, causing `EINVAL` when binding to `127.0.0.2`, and server listen address is hardcoded legacy IPv4.
test/parallel/test-https-localaddress.js: add `family: 4` to `https.request` `options` because `localhost` might resolve to `::1` if IPv6 is available, causing `EINVAL` when binding to `127.0.0.2`, and server listen address is hardcoded legacy IPv4.

test/common/inspector-helper.js: add `family: 4` to `http.get` options to make sure to connect via legacy IPv4 `localhost`, because inspector by default listens on legacy IPv4 `localhost`.
	Fixes:
		test/parallel/test-inspect-async-hook-setup-at-inspect.js
		test/parallel/test-inspector-esm.js
		test/parallel/test-inspector-inspect-brk-node.js
		test/parallel/test-inspector-multisession-ws.js
		test/parallel/test-inspector-reported-host.js
		test/parallel/test-inspector-wait-for-connection.js
		test/parallel/test-inspector-waiting-for-disconnect.js
		test/sequential/test-inspector.js
		test/sequential/test-inspector-async-hook-setup-at-inspect-brk.js
		test/sequential/test-inspector-async-hook-setup-at-signal.js
		test/sequential/test-inspector-async-stack-traces-promise-then.js
		test/sequential/test-inspector-async-stack-traces-set-interval.js
		test/sequential/test-inspector-break-e.js
		test/sequential/test-inspector-break-when-eval.js
		test/sequential/test-inspector-console.js
		test/sequential/test-inspector-debug-brk-flag.js
		test/sequential/test-inspector-debug-end.js
		test/sequential/test-inspector-exception.js
		test/sequential/test-inspector-not-blocked-on-idle.js
		test/sequential/test-inspector-scriptparsed-context.js
		test/sequential/test-inspector-stop-profile-after-done.js
		test/sequential/test-inspector-stress-http.js

test/parallel/test-net-dns-lookup.js: listen on `common.localhostIPv4` and add `family: 4` to `connect` to force legacy IPv4, because it is required by the assertion tests. Could be changed to DualStack compatibility by using `assert.match(ip, /^(127\.0\.0\.1|::1)$/);` and `assert.match(type.toString, /^(4|6)$/);`.
test/parallel/test-net-remote-address-port.js: add `::1` to `remoteAddrCandidates`. Why does this fix it?
test/parallel/test-tcp-wrap-listen.js: add ternary test with `hasIPv6` and use `bind` or `bind6` accordingly.
test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js: add `family: 4` to `connect` because it will default to localhost being `::1` if IPv6 is available, and listen address is hardcoded to be legacy IPv4 address for `localhost`.
test/parallel/test-tls-client-getephemeralkeyinfo.js: add `family: 4` to `connect` because without it will default to `localhost` which could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/parallel/test-tls-client-mindhsize.js: add `family: 4` to `connect` because without it will default to `localhost` which could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/parallel/test-tls-wrap-econnreset-localaddress.js: add `family: 4` to `connect` because without it will default to `localhost` which could resolve to `::1` if IPv6 is available, while server listen address is hardcoded legacy IPv4.
test/sequential/test-https-connect-localport.js: remove `family: 4` from connect because listen uses `localhost` which maybe resolves to `::1`? NEEDS TESTING! If it fails --> force legacy IPv4 with `common.localhostIPv4`.
test/sequential/test-inspector-open.js: add `family: 4` to `connect` because without it will default to `localhost` which could resolve to `::1` if IPv6 is available, while inspector is listening on legacy IPv4 `localhost` by default.
test/sequential/test-net-connect-local-error.js: add `family: 4` to `optionsIPv4` and `family: 6` to `optionsIPv6`, because it seems connecting on IPv4 will default to `localhost` which then resolves to `::1` if IPv6 is available and will cause an error.

test/common/inspector-helper.js

@@ -393,7 +393,7 @@ class NodeInstance extends EventEmitter {
     console.log('[test]', `Testing ${path}`);
     const headers = hostHeaderValue ? { 'Host': hostHeaderValue } : null;
     return this.portPromise.then((port) => new Promise((resolve, reject) => {
-      const req = http.get({ host, port, path, headers }, (res) => {
+      const req = http.get({ host, port, family: 4, path, headers }, (res) => {
         let response = '';
         res.setEncoding('utf8');
         res
@@ -419,6 +419,7 @@ class NodeInstance extends EventEmitter {
     const port = await this.portPromise;
     return http.get({
       port,
+      family: 4,
       path: parseURL(devtoolsUrl).path,
       headers: {
         'Connection': 'Upgrade',

test/parallel/test-cluster-message.js

@@ -111,7 +111,7 @@ if (cluster.isWorker) {
   // When a TCP server is listening in the worker connect to it
   worker.on('listening', function(address) {
 
-    client = net.connect(address.port, function() {
+    client = net.connect({ port: address.port, family: 4 }, function() {
       // Send message to worker.
       worker.send('message from primary');
     });

test/parallel/test-http-localaddress.js

@@ -42,6 +42,7 @@ const server = http.createServer((req, res) => {
 server.listen(0, '127.0.0.1', () => {
   const options = { host: 'localhost',
                     port: server.address().port,
+                    family: 4,
                     path: '/',
                     method: 'GET',
                     localAddress: '127.0.0.2' };

test/parallel/test-http-upgrade-client.js

@@ -68,6 +68,7 @@ server.listen(0, '127.0.0.1', common.mustCall(function() {
   headers.forEach(function(h) {
     const req = http.get({
       port: port,
+      family: 4,
       headers: h
     });
     let sawUpgrade = false;

test/parallel/test-http2-connect-options.js

@@ -22,7 +22,7 @@ const server = http2.createServer((req, res) => {
 });
 
 server.listen(0, '127.0.0.1', common.mustCall(() => {
-  const options = { localAddress: '127.0.0.2' };
+  const options = { localAddress: '127.0.0.2', family: 4 };
 
   const client = http2.connect(
     'http://localhost:' + server.address().port,

test/parallel/test-https-localaddress.js

@@ -52,6 +52,7 @@ server.listen(0, '127.0.0.1', function() {
   const options = {
     host: 'localhost',
     port: this.address().port,
+    family: 4,
     path: '/',
     method: 'GET',
     localAddress: '127.0.0.2',

test/parallel/test-net-dns-lookup.js

@@ -29,8 +29,8 @@ const server = net.createServer(function(client) {
   server.close();
 });
 
-server.listen(0, '127.0.0.1', common.mustCall(function() {
-  net.connect(this.address().port, 'localhost')
+server.listen(0, common.localhostIPv4, common.mustCall(function() {
+  net.connect({ port: this.address().port, host: 'localhost', family: 4 })
     .on('lookup', common.mustCall(function(err, ip, type, host) {
       assert.strictEqual(err, null);
       assert.strictEqual(ip, '127.0.0.1');

test/parallel/test-net-remote-address-port.js

@@ -28,7 +28,7 @@ const net = require('net');
 let conns_closed = 0;
 
 const remoteAddrCandidates = [ common.localhostIPv4 ];
-if (common.hasIPv6) remoteAddrCandidates.push('::ffff:127.0.0.1');
+if (common.hasIPv6) remoteAddrCandidates.push('::1', '::ffff:127.0.0.1');
 
 const remoteFamilyCandidates = ['IPv4'];
 if (common.hasIPv6) remoteFamilyCandidates.push('IPv6');

test/parallel/test-tcp-wrap-listen.js

@@ -14,7 +14,9 @@ const {
 
 const server = new TCP(TCPConstants.SOCKET);
 
-const r = server.bind('0.0.0.0', 0);
+const r = (common.hasIPv6 ?
+           server.bind6('::', 0) :
+           server.bind('0.0.0.0', 0));
 assert.strictEqual(r, 0);
 let port = {};
 server.getsockname(port);

test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js

@@ -32,12 +32,12 @@ server.listen(0, common.localhostIPv4, common.mustCall(() => {
   const countdown = new Countdown(2, () => server.close());
 
   {
-    const client = net.connect({ port: server.address().port });
+    const client = net.connect({ port: server.address().port, family: 4 });
     client.on('end', () => countdown.dec());
   }
 
   {
-    const client = net.connect({ port: server.address().port });
+    const client = net.connect({ port: server.address().port, family: 4 });
     client.on('end', () => countdown.dec());
   }
 }));

test/parallel/test-tls-client-getephemeralkeyinfo.js

@@ -40,6 +40,7 @@ function test(size, type, name, cipher) {
   server.listen(0, '127.0.0.1', common.mustCall(() => {
     const client = tls.connect({
       port: server.address().port,
+      family: 4,
       rejectUnauthorized: false
     }, common.mustCall(function() {
       const ekeyinfo = client.getEphemeralKeyInfo();

test/parallel/test-tls-client-mindhsize.js

@@ -41,6 +41,7 @@ function test(size, err, next) {
     const client = tls.connect({
       minDHSize: 2048,
       port: this.address().port,
+      family: 4,
       rejectUnauthorized: false
     }, function() {
       nsuccess++;

test/parallel/test-tls-wrap-econnreset-localaddress.js

@@ -16,6 +16,7 @@ const server = net.createServer((c) => {
   let errored = false;
   tls.connect({
     port: port,
+    family: 4,
     localAddress: common.localhostIPv4
   }, common.localhostIPv4)
     .once('error', common.mustCall((e) => {

test/sequential/test-https-connect-localport.js

@@ -23,7 +23,7 @@ const assert = require('assert');
       host: 'localhost',
       pathname: '/',
       port,
-      family: 4,
+      //family: 4,
       localPort: common.PORT,
       rejectUnauthorized: false,
     }, common.mustCall(() => {

test/sequential/test-inspector-open.js

@@ -80,7 +80,7 @@ function reopenAfterClose(msg) {
 }
 
 function ping(port, callback) {
-  net.connect(port)
+  net.connect({ port, family: 4 })
     .on('connect', function() { close(this); })
     .on('error', function(err) { close(this, err); });
 

test/sequential/test-net-connect-local-error.js

@@ -9,13 +9,15 @@ const expectedErrorCodes = ['ECONNREFUSED', 'EADDRINUSE'];
 
 const optionsIPv4 = {
   port: common.PORT,
+  family: 4,
   localPort: common.PORT + 1,
   localAddress: common.localhostIPv4
 };
 
 const optionsIPv6 = {
   host: '::1',
   port: common.PORT + 2,
+  family: 6,
   localPort: common.PORT + 3,
   localAddress: '::1',
 };