ssl: Set ca_certs parameter for keystone
ssl: Set ca_certs parameter for keystone

The ca_certs parameter is currently required for keystone and must point
to a valid CA file when ssl=>insecure is disabled, although this doesn't
make sense and will be addressed in crowbar[1]. Leaving the default
value without creating a valid CA bundle at that path was causing CI
failures for the HA scenario, so this change ensures it is set to the
default CA bundle.

[1] https://github.com/crowbar/crowbar-openstack/pull/1975

gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation