[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/6b2d681078b94fc8bf45b630b0c14b4f : SUCCESS in 7m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/58f713ba07954b7fa7ce4273ecaa2f05 : FAILURE in 6m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7f99a21db8f54ee8abe75f7d5e9e0923 : FAILURE in 7m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c036fd99551a4167b72a4680bca1d5f1 : FAILURE in 7m 01s