Return properly encoded URLs from JarResource#getResourceURL()

[jaikiran]

Fixes #15358

The commit here fixes the issue reported in #15358. The change involves, using the URI constructor to first properly encode (any special characters in) the resource name and then use the URI.toURL() to allow for the encoded path part to be used in the newly constructed URL.

This also include a test case which reproduces this issue and verifies the fix.

P.S: The test uses some special characters for directory and file names. These characters work fine on Linux, but I don't know if they are all allowed on Windows. So if this test case does indeed fail on Windows while trying to create a file or a directory, I will modify the test case to have it run only on *nix and maybe come up with some other characters for the file/directory for Windows.

[jaikiran]

The failures are these (and look unrelated):

2021-02-28T16:02:14.1144584Z Executing [docker, run, --rm, -p, 8081:8081, -p, 8444:8444, --env, QUARKUS_HTTP_PORT=8081, --env, QUARKUS_HTTP_SSL_PORT=8444, --env, TEST_URL=http://localhost:8081, runner/quarkus-integration-test-container-image-standard:999-SNAPSHOT]
2021-02-28T16:02:16.5932798Z [ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 7.328 s <<< FAILURE! - in io.quarkus.it.container.image.GreetingResourceIT
2021-02-28T16:02:16.5953611Z [ERROR] io.quarkus.it.container.image.GreetingResourceIT.testHelloEndpoint  Time elapsed: 2.396 s  <<< ERROR!
2021-02-28T16:02:16.5955398Z javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
2021-02-28T16:02:16.5957383Z 	at sun.security.ssl.SSLSocketImpl.handleEOF(SSLSocketImpl.java:1310)
2021-02-28T16:02:16.5959020Z 	at sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1151)
2021-02-28T16:02:16.5968115Z 	at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1054)
2021-02-28T16:02:16.5969857Z 	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:394)
2021-02-28T16:02:16.5971903Z 	at org.apache.http.conn.ssl.SSLSocketFactory.createLayeredSocket(SSLSocketFactory.java:570)
2021-02-28T16:02:16.5974568Z 	at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:554)
2021-02-28T16:02:16.5979737Z 	at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:415)
2021-02-28T16:02:16.5983103Z 	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
2021-02-28T16:02:16.5986887Z 	at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:326)
2021-02-28T16:02:16.5989628Z 	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:605)
2021-02-28T16:02:16.5992234Z 	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:440)
2021-02-28T16:02:16.5994623Z 	at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835)
2021-02-28T16:02:16.5996879Z 	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
2021-02-28T16:02:16.5999144Z 	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
2021-02-28T16:02:16.6000856Z 	at org.apache.http.client.HttpClient$execute$0.call(Unknown Source)

and this one on Windows:

2021-02-28T14:33:20.1949722Z [ERROR] Tests run: 11, Failures: 1, Errors: 0, Skipped: 1, Time elapsed: 133.915 s <<< FAILURE! - in io.quarkus.maven.it.PackageIT
2021-02-28T14:33:20.1951427Z [ERROR] io.quarkus.maven.it.PackageIT.testCustomPackaging  Time elapsed: 16.785 s  <<< FAILURE!
2021-02-28T14:33:20.1952943Z org.opentest4j.AssertionFailedError: 
2021-02-28T14:33:20.1953654Z 
2021-02-28T14:33:20.1972645Z expected: 0
2021-02-28T14:33:20.1973478Z but was : 1
2021-02-28T14:33:20.1975081Z 	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2021-02-28T14:33:20.1980310Z 	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
2021-02-28T14:33:20.1983765Z 	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
2021-02-28T14:33:20.1986560Z 	at io.quarkus.maven.it.PackageIT.testCustomPackaging(PackageIT.java:146)

I'll take a look at the PackageIT test later today to see if it's related to the change in this PR.

[geoand]

Thanks!

[rsvoboda]

Reproducer from #15358 now passes