Build failed. https://zuul.opendev.org/t/openstack/buildset/410512927b124080ad0e1cb19d4eb482 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e6cd81f8feef4d5485497266c5d42738 : SUCCESS in 6m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/131241c49b9a410e886325cf70827586 : FAILURE in 3m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c8f771d99f404fd38989916b65240b9c : SUCCESS in 3m 36s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4a9bc25cd317405488268fec4cae5051 : SUCCESS in 3m 28s