Build failed. https://zuul.opendev.org/t/openstack/buildset/b88526d66a084d35aa6d0512f8183340 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/63778ea1f3564ac9bd35740b03cd29c6 : SUCCESS in 2m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0388286548bd468793a53fd7eed98c41 : SUCCESS in 2m 59s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ceafe21fc140488e94856ce49dcadb10 : SUCCESS in 2m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/90cbb2e1c9214b4aac21d602e929892c : FAILURE in 3m 25s