0dd1e186b5
When devstack was switching to ML2/OVN as default backend, in the base grenade job it was explicitly configured to use old default ML2/OVS backend. It was done like that to avoid problems with upgrade and change backend in the same job. Now, as ML2/OVN is default backend in Devstack since at least couple of cycles it's fine to switch grenade jobs to use default backend. Depends-On: https://review.opendev.org/c/openstack/ironic/+/866993 Depends-On: https://review.opendev.org/c/openstack/devstack/+/867065 Change-Id: Iede9fe71d81fc86a92122800d5a16f45442dd79e