mgmt/glusterd: do not check for snapd handle in restore if uss is disabled

Change-Id: I01afe64685a5794cce9265580c6c5de57a045201
BUG: 1119582
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-on: http://review.gluster.org/8310
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>