Build failed. https://zuul.opendev.org/t/openstack/buildset/df46f39113ce43a29f7d4c648d611890 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/014be1f977594bd68a9158986b528feb : FAILURE in 6m 33s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2455c8afe9f94ffeaebc54a7f309673f : SUCCESS in 4m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e49c3e7407034d3cb68d9439833b158a : SUCCESS in 6m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/88f20e290f2d441d9f285e64fea60fc0 : SUCCESS in 5m 22s