Build failed. https://zuul.opendev.org/t/openstack/buildset/85825a70b1bf4c7a984db7c1f81a8d2d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/094eddfa45d74373a8a7c7eb97281f34 : FAILURE in 3m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/381c6f370d27478bb4e91beb447a2512 : FAILURE in 4m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b43bf9d673124b398f5c2359f653eb72 : FAILURE in 4m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2c683410501442b1b79d99a2ad772197 : FAILURE in 4m 11s