Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/94970a3d723f43498ddd714269b3c44a : SUCCESS in 4m 34s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ed85796d4cd842069c6eca7425e8470e : SUCCESS in 7m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/adeefdadc3bd42a2846c8efda9668fa8 : SUCCESS in 6m 09s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2147f4a4aa0244d9a0f9339cf3305eb0 : FAILURE in 4m 33s