
1. Update the UPPER_CONSTRAINTS_FILE to releases.openstack.org[1] 2. Blacklist sphinx 2.1.0[2] [1]: http://lists.openstack.org/pipermail/openstack-discuss/2019-May/006478.html [2]: https://github.com/sphinx-doc/sphinx/issues/6440 Change-Id: Ie5f9ae1bd5c45617c6b7fde0e490d471e172c24e