Build failed. https://zuul.opendev.org/t/openstack/buildset/af3feac448af43d49c9c09f06cfb17f2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f36a80c471a349e0a82515d2d664c70f : SUCCESS in 4m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5e0e2b8ce66a477da775071d63ee1497 : SUCCESS in 4m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3eece1c64f5c4349a2c871d0718a5ce3 : FAILURE in 4m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2ab3df8a688b469696ce1aaa37f983b3 : SUCCESS in 4m 48s