Build failed. https://zuul.opendev.org/t/openstack/buildset/657ac7730d3447d88e58c1892e0627bf - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1854599da82846d5be0d28e0cd00d884 : SUCCESS in 3m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b70c81ccfa1e4b7a8841eaf878221c60 : SUCCESS in 4m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/72549e74a1f748f2bb07892b244827bf : SUCCESS in 4m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4cf59bdd23f945458c71f8725054e72d : FAILURE in 3m 55s