[REFACTOR] cleaned up VCSResourceInfo

Made public fields private and added getter methods.

Also removed the VCSResourceInfo class in the Eclipse Package as it
was not deleted when creating the VCSProvider interface.

Change-Id: I7c4a5f96dba7de57089b758aa7b2e1d104d4487b
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1723
Tested-by: Jenkins-Core QA
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>