[Openstack-stable-maint] Stable check of openstack/tooz for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/3e09bbd536aa4ff1ba0eecae1d7924... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ebbca97c17c44ef18bff97d1f134c38b : SUCCESS in 5m 50s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6a9fe2f1bb784a409b4d7850d7fc8e00 : SUCCESS in 5m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/427b677ca18e4de4bc3af6ccdc7b5db0 : SUCCESS in 5m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/475f57be75424f7c9c54ee15d60c4648 : FAILURE in 6m 11s