Fire GitReferenceUpdated from NotesBranchUtil

Callers of NotesBranchUtil don't have to remember to fire the
GitReferenceUpdated event. As a side effect this change also fixes the
issue that the BanCommit command didn't fire this event for the
refs/meta/reject-commits branch.

Change-Id: I41c65c469367c2f80ab6dbd3b40448d7ac4a9470
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>
5 files changed