Build failed. https://zuul.opendev.org/t/openstack/buildset/e5dd21fa66624b788fa753963ca48eb9 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e609583bdd86493cbc15e4e5dd0aa3be : SUCCESS in 3m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c4c8adad781a434394d6ee7e29c89f48 : SUCCESS in 3m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/07b5d60c4732418cbe302bc12ed53bec : SUCCESS in 2m 43s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/20d6d24f00f941ac93afcceefc011a99 : FAILURE in 2m 39s