Build failed. https://zuul.opendev.org/t/openstack/buildset/f5064b1609d649a0aa2bac1c44f17808 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5921baa32c4e4e248889b886db34581f : SUCCESS in 2m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8a6b944da66649feb7b1f4c1aab55bf8 : SUCCESS in 2m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d0108483f7ae4afea344a54e5ec749e4 : SUCCESS in 2m 17s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0220eda95a4041c8b160e9a1a4058a44 : FAILURE in 2m 39s