Build failed. https://zuul.opendev.org/t/openstack/buildset/14ec247abdc540329d2aadbd2a1a8073 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0382df06b2454397a760558978a2235c : SUCCESS in 6m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f1831da59a924d60afc39a9740b0fa15 : SUCCESS in 7m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/55528e4a67f84be99c38200c0287a382 : SUCCESS in 4m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2bb1769b9d154709811196d5eef15a43 : FAILURE in 5m 19s