Build failed. https://zuul.opendev.org/t/openstack/buildset/6ba896f20ec2413dbed4647dab5bd84d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/107a8e70d8da4316bd3af1f6d3a6a6bf : SUCCESS in 3m 27s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/cafb00c81c154e59a15175b32483d6ee : SUCCESS in 2m 52s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/aece4fae6ddf44c094b7a17ae2bc26e9 : SUCCESS in 3m 36s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e8b3705bb6984862a54cb5cb030da6c4 : FAILURE in 3m 01s