glusterd: Made volume-status use synctask framework

Change-Id: Id4062799104e5831467ced65a43bfe377b6163f4
BUG: 852147
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/4297
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>