glusterd/cli: Geo-Replication "status detail" cmd

Provides detailed status info in the following format

                    MASTER <master-vol>  SLAVE <slave-vol>

NODE   HEALTH   UPTIME  FILES SYNCD  FILES PENDING  BYTES PENDING  DELETES PENDING
-----------------------------------------------------------------------------------

This patch introdues "status detail" command to show crawl related
information in CLI. These values are "pulled" from gsyncd when
"status detail" is executed.

Change-Id: I1fdaf7180eacce054a864d34971dc160bd7301e1
BUG: 990420
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Reviewed-on: http://review.gluster.org/5590
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Tested-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>