Build failed. https://zuul.opendev.org/t/openstack/buildset/8185ea9d95ac42e18d9ab166f05a266f - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a4eba5a1597d447cb314e48d834035b0 : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9c0bccbb7f2c41a188fd6dba2e6c8a34 : SUCCESS in 2m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1195f9a59fb74c9fad7b74da26718165 : SUCCESS in 2m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7ecf3980dd9a4b048925868e111829cb : FAILURE in 2m 21s