Build failed. https://zuul.opendev.org/t/openstack/buildset/b5489809a62e49e89a21747a37d2b55e - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c54a8e475e874ee5aff54044b2d1955e : FAILURE in 6m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a77bd0694b494f0d8396d9fe48727d51 : FAILURE in 6m 42s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cb53013a2ff74054b24cf0b474da4f04 : FAILURE in 5m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5062a0d116984abbb2ab87f211c488ba : FAILURE in 5m 25s