RPM now updates F18 UFO

The RPM can now be installed on a system to upgrade previous
installation of gluster-swift and gluster-ufo (which replaced
gluster-swift-plugin)

It also replaces all the glusterfs-swift-* servers

Change-Id: I1c1eeaa1b0a93fdb1eaf2ed018a365c4415c06b0
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/5297
Reviewed-by: Peter Portante <pportant@redhat.com>
Tested-by: Peter Portante <pportant@redhat.com>