Do not install unnecessary Orbit bundles

Do not install unnecessary Orbit bundles

The org.eclipse.jgit.orbit.feature introduced recently in order to
install 3rd party Orbit dependencies is a too coarse grained approach
and has the effect to install some dependencies only needed for
org.eclipse.jgit.pgm when installing org.eclipse.jgit.feature.

Hence include the required 3rd party bundles into the respective jgit
features directly in order to avoid this problem.

Bug: 397356
Change-Id: I3a4a07de42808e787515a6865875d9513542d3f8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>