afr : Logging improvement

In case of a split brain, adding the type of split brain that
might have occurred.
Added a few details to entry-self-heal in self-heal completion
status.

Change-Id: Ie99e2ecdd8aa5b1c57d7d4515d33a17dfa0c67ad
BUG: 1101138
Signed-off-by: Anuradha <atalur@redhat.com>
Reviewed-on: http://review.gluster.org/7870
Reviewed-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Tested-by: Niels de Vos <ndevos@redhat.com>