Build failed. https://zuul.opendev.org/t/openstack/buildset/3af7118a5f3844138df6c19fcdb5743b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/611e30db7cc945449792b6ccd70b710c : FAILURE in 3m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/52b15195ca9d42acb54b7838271ca196 : FAILURE in 3m 52s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f8ba607058844ec18bdaeff0bf9b6f62 : FAILURE in 5m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c2444ccb5a7c435bb58f64ec5efb0ad4 : FAILURE in 4m 48s