Comment 2 for bug 1781255

o/ Alan, that is done here FYI https://github.com/openstack-infra/tripleo-ci/blob/ad050216c2cc5c3ea0786b85dee9a1ee1b4eed40/scripts/tripleo.sh#L293-L318 - we are working on moving away from using tripleo.sh altogether with https://trello.com/c/GvjcnJB2/850-translate-tripleosh-bootstrap-subnodes-into-a-series-of-tasks but for now I posted a review at https://review.openstack.org/583547 which makes luminous the default should help i think