Merge pull request #5 from robstryker/serverMockup

Server mockup
fixing small issues
added karaf 3 runtime type
removed karaf 2.0 and 2.1 from supported runtimes and added 3.0 and tests, shutdown works now
code cleanup
added poller for karaf servers
UI plugin does not start when server view is loaded. This causes shell not to be shown after server starts. Fixed