Build failed. https://zuul.opendev.org/t/openstack/buildset/a9df8df7150c4b76a10b31fbe95fd84d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/100961aa0a8a4677904957f74cc57398 : SUCCESS in 3m 18s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/af08fd224aad4c43ae4c656f63cf64fc : SUCCESS in 3m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/fa8a4aa7ab1f4d218a07f35feb19b31e : SUCCESS in 2m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/76d9bc34d87a4f999bf0dfee686fab8b : FAILURE in 3m 21s