Comment 4 for bug 1868285

Reviewed: https://review.opendev.org/714250
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=8f566781051ee7b227e018d51296f24589384786
Submitter: Zuul
Branch: stable/train

commit 8f566781051ee7b227e018d51296f24589384786
Author: Mark Goddard <email address hidden>
Date: Fri Mar 20 17:03:14 2020 +0000

    Fix service_mapped_to_host filter

    The service_mapped_to_host filter is used to check if a service is
    mapped to a host, based on the group for the service or its
    host_in_groups attribute if one exists. We check if the service's group
    is in the 'groups' list. However, to get the list of groups to which a
    host belongs, we should use the 'group_names' list.

    This filter is currently only used in neutron IPv6 module loading, so
    the effects are minimal.

    Change-Id: I37409ca8d273b0426df0a648db222dc5432e738a
    Closes-Bug: #1868285
    (cherry picked from commit 35966c9186d868948a037bae7c58ac6e6279a4f0)