Comment 4 for bug 1544961

This is a combination of https://review.openstack.org/#/c/244420/2 (pulled from upstream) and https://github.com/openstack/django_openstack_auth/commit/3715a5f445254520f951a5d791fb5eeeeb2b2b57 not pulled from upstream. The latter commit was merged on Dec 9, 2015 which means that it's present starting from 2.1.0 release while we're still using 2.0.0 release for 9.0, see http://perestroika-repo-tst.infra.mirantis.net/mos-repos/ubuntu/9.0/pool/main/p/python-django-openstack-auth/

That needs to be fixed.