Merge pull request #8030 from yehudasa/wip-rgw-sync-status

adds the radosgw-admin sync status command that gives a human readable status of the sync process at a specific zone

Reviewed-by: Orit Wasserman <owasserm@redhat.com>

diff --cc src/rgw/rgw_admin.cc
Simple merge

diff --cc src/rgw/rgw_rados.cc
Simple merge