Build failed. https://zuul.opendev.org/t/openstack/buildset/3dfda94a13f146799f0cd3ed6d277548 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/900b89c214304ebb82058bc89d57a1be : SUCCESS in 5m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/725ee80789c645d095f7b933a2a48e2c : SUCCESS in 6m 42s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e5c0ced96d6b41b9b307c3ff0bd20c87 : SUCCESS in 6m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f82ee1b9f50a4b0f9f57ed2d736d9f96 : FAILURE in 3m 47s