object-storage: Removed the redundant REMOTE_CLUSTER option.

Gluster cli uses the remote-host option to connect to the glusterd
and by default it uses localhost to connect to glusterd. So, UFO code
will use the remote-host option everytime to connect to the glusterd.

Change-Id: I5a684d3c43fe9bdc9cc0b7c472a9d8145f9e1fd4
BUG: 878663
Signed-off-by: Mohammed Junaid <junaid@redhat.com>
Reviewed-on: http://review.gluster.org/4690
Reviewed-by: Peter Portante <pportant@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>