gsyncd/geo-rep: Fix remote vol info fetching for non-root

Signed-off-by: Kotresh H R <khiremat@redhat.com>

Change-Id: If1d2cab3fcfe2391105551e54f0b9729a7c204e4
BUG: 1077452
Reviewed-on: http://review.gluster.org/7767
Reviewed-by: Venky Shankar <vshankar@redhat.com>
Tested-by: Venky Shankar <vshankar@redhat.com>