packaging: call the zypper repo ceph-rpm-under-test
packaging: call the zypper repo ceph-rpm-under-test

The zypper repo must have a name/alias and "ceph-rpm-under-test" seems better
than just "ceph-rpm"; it's a repo containing the ceph RPMs that are being
tested.

Signed-off-by: Nathan Cutler <f9d8c66a4e898e67db786769b5b347b640e1a9a6@suse.com>

SUSE/teuthology,dmick/teuthology,SUSE/teuthology,ceph/teuthology,SUSE/teuthology,dmick/teuthology,dmick/teuthology,ceph/teuthology,ktdreyer/teuthology,ktdreyer/teuthology