JERSEY-2315 JerseyTest now uses it's own getProperty method for getting ...

...the port number to use, which makes it possible to overriding it by calling jerseyTest.set(TestProperties.CONTAINER_PORT, N). Test uses forceSet(), only because Maven in BuildHive sets the port number system property. When the system property is not set, using set() works well. Also, updated copyright year.

I was a little bit confused by the way BuildHive runs Maven, and I see that there are other test failures not caused by this pull request.

Sorry for the multiple pull requests! :)