tests: never fail when copying the base directory
tests: never fail when copying the base directory

Starting with kraken the base image will no longer exist, so ensure
that this step will not fail when testing kraken images.

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

mkkie/ceph-docker,osixia/ceph-docker,cdxvirt/ceph-docker,AcalephStorage/ceph-docker,mkkie/ceph-docker,rootfs/ceph-docker,ceph/ceph-docker,osixia/ceph-docker,osixia/ceph-docker,JrCs/ceph-docker,JrCs/ceph-docker,AcalephStorage/ceph-docker,cdxvirt/ceph-docker,AcalephStorage/ceph-docker,JrCs/ceph-docker,ceph/ceph-docker,rootfs/ceph-docker