glusterd: rebalance to ref volinfo before starting

Change-Id: Ib316897dcbd0748bfb3bfcda186b9fe30c07f80f
BUG: 1038051
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/6522
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>