Close Telemetry Server: subset A, step A.2 & A.3

- A.2: Stop the Telemetry HTTP server `telemServer` from accepting new connections.
- A.3: Stop the Control Console HTTP server `consoleServer` from accepting new connections.
- Fix console log messages on Open-MCT Static Server closure.

iCubTelemVizServer/iCubTelemVizServer.js

@@ -181,12 +181,34 @@ function handleTermination(signal) {
     /*
      * === Closure subset A ===
      * A.1 - Stop the child Node.js process running the OpenMCT static server.
+     * A.2 - Stop the Telemetry HTTP server telemServer from accepting new connections.
+     * A.3 - Stop the Control Console HTTP server consoleServer from accepting new connections.
      */
     const closeChildProcessPromise = new Promise(function(resolve,reject) {
         ret = openMctServerHandler.stop(signal,resolve,reject);
         console.log(ret);
     });
-    Promise.all([closeChildProcessPromise]).then(
+    const closeTelemServerPromise = new Promise(function(resolve,reject) {
+        telemServer.close((error) => {
+            if (error === undefined) {
+                resolve('iCub Telemetry Server closed: all sockets closed.');
+            } else {
+                reject(error);
+            }
+        });
+        console.log('iCub Telemetry Server closing: no further connection requests accepted.');
+    });
+    const closeConsoleServerPromise = new Promise(function(resolve,reject) {
+        consoleServer.close((error) => {
+            if (error === undefined) {
+                resolve('Control Console Server closed: all sockets closed.');
+            } else {
+                reject(error);
+            }
+        });
+        console.log('Control Console Server closing: no further incoming requests accepted.');
+    });
+    Promise.all([closeChildProcessPromise,closeTelemServerPromise,closeConsoleServerPromise]).then(
         function(values) {
             values.forEach((v) => console.log(v));
         },

openmctStaticServer/server.js

@@ -31,11 +31,12 @@ SignalName2codeMap = require('../common/utils').SignalName2codeMap;
 function handleTermination(signal) {
     console.log('Received '+signal+' ...');
     vizServer.close(() => {
-        console.log('Open-MCT Visualizer Server closed. No further requests accepted. Refreshing the visualizer web page will fail.');
+        console.log('Open-MCT Visualizer Server closed: all sockets closed.');
         process.exitCode = 128+SignalName2codeMap[signal];
         process.removeListener('SIGINT', inhibit2ndSIGINT); // Remove the idle listener
         clearTimeout(handleTermination.prototype.sigintTimer);    // Cancel the timeout that would remove the idle listener
     });
+    console.log('Open-MCT Visualizer Server closing: no further incoming requests accepted. Refreshing the visualizer web page will fail.');
     vizServerTracker.closeAll();
     // Run a timer for scheduling the removal of the idle listener in case the server closure gets stuck
     handleTermination.prototype.sigintTimer = setTimeout(function () {process.removeListener('SIGINT', inhibit2ndSIGINT);},5000);