Handle async Tooz calls appropriately
Handle async Tooz calls appropriately

he CoordinationMixin treats some async calls as synchronous, in
environments with high latency etc, this can result in out of
order operations causing failures.

Change-Id: Ic8ce8f08910681260ccb77f423ac1a8fa19d8bd1
Closes-Bug: 1566285

openstack/designate,openstack/designate,openstack/designate