Do not overwrite swift config files on upgrade

We now include the config files as part of the RPM and include
the directive %config(noreplace) in the RPM specfile for
upgrades, installations, and removals.

When the system is now upgraded to this fix number, any of the
config files edited are kept verbatim.  When the system
is upgraded to the gluster-swift project, their config files
are saved as ${configfile}.rpmsave since they will need to
re-inspect the file using the new grizzly settings.

BUG: 1001418

Change-Id: I306501d3148f5f6a1d2ee381a9abd98efccadd00
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/5706
Reviewed-by: Peter Portante <pportant@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>