geo-rep/glusterd: Fix geo-rep status on introduction of volume lock

        Getting op context in 'glusterd_op_gsync_set' is no longer
        valid as it is expected that 'rsp_dict' sent from caller is
        filled. It was fine till now as no one was setting the op
        context. The introduction of volume locks sets it,
        consequently breaking geo-rep status command. Hence the
        code that gets dict from op context if present is removed.

        Also corrected some indentation issues in 'glusterd_op_gsync_set'

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

Change-Id: Ieacd6e6c9be3c92159f849caca2acf5aabca1e32
BUG: 1077697
Signed-off-by: Kotresh H R <khiremat@redhat.com>
Reviewed-on: http://review.gluster.org/7289
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>