Build failed. https://zuul.opendev.org/t/openstack/buildset/1a986044e9314b82944fe49fd9b68853 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5e2d0f19317445f38085c1e7a5947b9e : SUCCESS in 5m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9df51913aab04c32a974aa479373f4d7 : SUCCESS in 6m 04s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/70284ed27b6e4e28acf83c198504f397 : SUCCESS in 5m 34s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7245651e51b9468ba1d76c1a20b1fce0 : FAILURE in 5m 47s