Build failed. https://zuul.opendev.org/t/openstack/buildset/474817aec53b4da49bf257570b12432a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/88bf6bcc2702410d850c1f2b6f7e3741 : SUCCESS in 4m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/47f83f446e344011ba7f4f013c0b6be9 : SUCCESS in 6m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8a46c3f7f3944986aab9f2d2ea2baae4 : SUCCESS in 4m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ae1b6fbba3d149b09c1d75f875e59b69 : FAILURE in 6m 29s