Comment 5 for bug 1687594

I've just tried this and it appears that os-neutron-install.yml would fail as designate variables would not exist in it's play.
You should add designate variables to group_vars/all.yml with this change.

See log:
TASK [os_neutron : Copy common neutron config] *********************************
Tuesday 26 September 2017 13:24:48 +0000 (0:00:00.651) 0:00:49.866 *****
fatal: [controller1_neutron_server_container-191d95b7]: FAILED! => {"failed": true, "msg": "'designate_service_url' is undefined"}
fatal: [controller2_neutron_server_container-a0b2414b]: FAILED! => {"failed": true, "msg": "'designate_service_url' is undefined"}