Before this fix, the test tried to determine the OpenStack
release based on the ceph-mon charm. Unfortunately Ceph has
the same version on Ussuri and Victoria. As a consequence
the test would wrongly conclude that it's testing against
"groovy_ussuri", which isn't a valid Ubuntu/OpenStack pair.
With this fix, the test now determines the OpenStack
release based on the keystone charm, with which we are able
to tell Ussuri and Victoria apart. This test class is being
run against the following charm functional tests at the
moment, which all have a keystone charm in their test
bundles: nova-compute, cinder-ceph, glance, ceph-fs,
ceph-radosgw and gnocchi.
Aurelien Lourot
a8ca4720a3