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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7fccbf56d4dd40339ab420c31836c4cc : SUCCESS in 7m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6937f1666ca8482b87a4e17b66415445 : FAILURE in 5m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e9867b87a2484314b5075ef7d28676eb : FAILURE in 6m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ec6ad212cce14df7b50c34f1e42b48e2 : FAILURE in 8m 13s