glusterd: Correctly reset volinfo->caps during volume create

Change-Id: I012899be08a06d39ea5c9fb98a66acf833d7213f
BUG: 1120589
Signed-off-by: Kaushal M <kaushal@redhat.com>
Reviewed-on: http://review.gluster.org/8323
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>