Comment 4 for bug 1826246

It's being used here.
https://opendev.org/openstack/openstack-ansible-os_keystone/src/branch/master/tasks/keystone_idp_setup.yml#L26

Last time I checked, ansible-collections-openstack does not still have needed functionality implemented. And we simply don't have time to add it there as of today. But it would be great to get rid of it.