glusterd/snapshot : Logging the soft-limit reach warning and
hard-limit failure.

Change-Id: I5083d30c04c784b7f134b8a919b84c225c25f806
BUG: 1112085
Signed-off-by: Sachin Pandit <spandit@redhat.com>
Reviewed-on: http://review.gluster.org/8147
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>