build: prevent double packaging of geo-replication and other scripts

The regression-tests sub-package contains /usr/share/glusterfs/* instead
of including only the needed files. This causes some of the scripts that
are part of geo-replication to be packaged twice.

BUG: 1169005
Change-Id: Ib452e73f3c1775b252ab257aab852ad9af857e74
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/9272
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>