Disallow to push to non-connected target

Check if a commit which is pushed to Gerrit is connected to the
target branch. If not, disallow the push.

Bug: issue 947
Change-Id: Icc61330ed040e8faab7a787c9ba688bde4216cb9
Signed-off-by: Stefan Lay <stefan.lay@sap.com>
1 file changed