Build failed. https://zuul.opendev.org/t/openstack/buildset/b8cf139112e6400e9548ff69e990c540 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6382227f0c9b497497e97db07e85f3e4 : SUCCESS in 4m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ae6589452d0244be9d6639d9bcb72714 : SUCCESS in 4m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/78d4027c41204575bca3c18075c697b6 : SUCCESS in 4m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0681309f3a124d9e8323613c73c28246 : FAILURE in 4m 02s