Comment 2 for bug 1804194

Reviewed: https://review.openstack.org/618983
Committed: https://git.openstack.org/cgit/openstack/networking-ovn/commit/?id=4ea65133984caec42906c0566dd751f593ca8711
Submitter: Zuul
Branch: master

commit 4ea65133984caec42906c0566dd751f593ca8711
Author: Miguel Angel Ajo <email address hidden>
Date: Tue Nov 20 11:33:12 2018 +0100

    Fix neutron resource cleanup after ml2/ovs migration

    The migration script "delete-neutron-resources" was being
    executed on controller-0 instead of the undercloud node regardless
    of the defer_to:localhost ansible setting.

    In that controller ~/overcloudrc does not exist, so the cleanup
    was failing silently.

    This commit moves the cleanup to a separate role that we tie
    to localhost (undercloud) from ovn-migration.yml

    Closes-Bug: #1804194

    Change-Id: I05f2411604ba01d170440ac655491a624f98aafc