Comment 4 for bug 1299517

For history, this is the API removal that made it into Icehouse: https://review.openstack.org/#/c/75535/

This is the series that merged on master to remove everything else but the data model:

https://review.openstack.org/#/q/status:merged+project:openstack/nova+branch:master+topic:noquotaclass,n,z

I'm going to revert the series on master first and then revert the API change after that, then cherry pick the API removal revert back to stable/icehouse to get that working again.

I think vishy was talking about adding a Tempest test on master to make sure this isn't removed again in the future without further consideration.