Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2aba5cd1be014d2a9ca42a117979302d : SUCCESS in 4m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/41b2fc4d1c41463cb670da3efb64de30 : SUCCESS in 4m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8a5b8d72f8624d8c923c00fb8deed7ec : SUCCESS in 4m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/88a12ff309564b60b59817ff45843164 : FAILURE in 4m 40s