cluster/afr : Prevent excessive logging of split-brain messages.

        Running the volume heal info command would result in
excessive logging of split-brain messages. After this patch,
running heal info command will not log the split brain messages.
This info is now displayed in the output of heal info command
instead.
If a file is in split-brain, a message "Is in split-brain"
will be written against its name.

Change-Id: Ib8979be04f5ac7c59ce3ad1185886bb54b8be808
BUG: 1161102
Signed-off-by: Anuradha <atalur@redhat.com>
Reviewed-on: http://review.gluster.org/9069
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>