openstack-ardana: run manila tests on MU gating jobs
openstack-ardana: run manila tests on MU gating jobs

Manila tempest tests are not being executed by the maintenance update
gating jobs. This change adds Manila to the list of tests the job runs.

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