Build failed. https://zuul.opendev.org/t/openstack/buildset/c3936864b7bb4af18aa93c8c51f8e7d6 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cb7e49248504459ea77990b16a36164c : SUCCESS in 2m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9a864dfd34954803b34a86ca21db3bfc : FAILURE in 2m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3db430b2ec6c40038304de207818a09c : SUCCESS in 2m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b3b89a4b832d46e0baba3f385dd9e3c2 : FAILURE in 2m 36s