Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6537331e76864ac3a70b6051c73ad661 : SUCCESS in 4m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ff51e5f4bafa4dab8c0e95bf496316e2 : SUCCESS in 6m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d7e7ee8636f84cf29a7a9b9f3930e04d : SUCCESS in 4m 55s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d64bfd05d8b44d17873865205637151e : FAILURE in 6m 42s