Previously, when running one of the following commands:
kolla-ansible deploy --check
kolla-ansible genconfig --check
deployment or configuration generation fails for various reasons.
MariaDB fails to lookup the existing cluster.
Keystone fails to generate cron config.
Nova-cell fails to get the cell settings.
Closes-Bug: #2002661
Change-Id: I5e765f498ae86d213d0a4379ca5d473db1499962