Comment 4 for bug 1971605

From ykarel, the usage of run_test_role_vars like this:

- job:
    name: tripleo-ci-centos-8-containers-multinode-test
    parent: tripleo-ci-centos-8-containers-multinode
    vars:
      mirror_fqdn: afs-mirror.sf.hosted.upshift.rdu2.redhat.com
      run_test_role_vars:
          custom_nameserver:
            - 10.5.30.160
            - 10.11.5.19
          undercloud_undercloud_nameservers:
            - 10.5.30.160
          ntp_server: '10.5.26.10,clock.redhat.com,clock2.redhat.com'
          undercloud_undercloud_ntp_servers:
            - 10.5.26.10
            - clock.redhat.com
      external_net: provider_net_shared_3

might work, see https://github.com/openstack/tripleo-ci/blob/d492451c1311e6d83cc7816ca93a5381948dea50/roles/run-test/templates/role-vars.j2#L1

To be tested.