Sync in wip/arcus/ussuri-staging into wip/arcus/wallaby-staging

.automation.conf/config.sh

 # Enter config overrides in here
-# These are required to diff against an older version of the config without requirements.txt
-OPENSTACK_SERIES=victoria
-KAYOBE_URI=https://github.com/RSE-Cambridge/kayobe
-KAYOBE_BRANCH=cumulus/victoria
 
 export TEMPEST_CONCURRENCY=2
 # Specify single test whilst experimenting