Improve EGit.setup
Improve EGit.setup

- move JGit and EGit tests to separate working sets
- move features, target definitions and p2 repository definitions to a 
  releng working set

Change-Id: Ie9451f7bcd70f1cae33a5292e4baa6300feb1c6a
Signed-off-by: Matthias Sohn <446760a3fbea85cd5f8f4f5c3de304fe3a38014f@sap.com>
collaborative-modeling/egit,collaborative-modeling/egit