Comment 2 for bug 1599984

This line is the culprit: https://github.com/openstack/openstack-ansible/blob/master/playbooks/inventory/dynamic_inventory.py#L887. I have also confirmed this behavior with a failing test case locally.

My opinion is that this code is correct - the overrides "win". However, we're in a situation here where the overrides are actually old code and unwanted, so we need to do some action on upgrade to clean up the etc override direcftory.