Build failed. https://zuul.opendev.org/t/openstack/buildset/4c12197ef69345a4a6869fd256fd033d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ae665efa19404591b78d418dff283196 : SUCCESS in 3m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ced763d8da1743a3af5b2aba21f78de8 : FAILURE in 2m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/571bdf033b89465e80d21a3ded28f9e0 : SUCCESS in 4m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5d8cd14a0b6746a183d87f52d2763741 : SUCCESS in 3m 48s