sp: remove unused scsiFencing parameter

Change-Id: I7d9b62c08cf8925fbc1856655dc49dd41eacd2d9
Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21555
Reviewed-by: Ayal Baron <abaron@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>