These are additions to make the Octavia Upgrade tests in the
charmed-openstack-tests repository a little easier to specify. Also
depends on the zaza change [1].
[1] https://github.com/openstack-charmers/zaza/pull/442
This patch modifies the existing openstack upgrade tests so that they
work with focal (by explicitly supporting mysql-innodb-cluster), and are
also interruptable and resumable (at a charm level). It also makes them
work with the udpated 'get_upgrade_groups()' that ultimately gets a List
of Tuples rather than a dictionary.