[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/63e9b57bac4a42ec81f22777024e7528 : SUCCESS in 9m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e3c0fabfa46f444e885a153afe7d6a64 : FAILURE in 9m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/abc2dc075d3544f699c7c383b199173a : FAILURE in 9m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ecbcc9f7a2404292bc140f934f4bbd1b : FAILURE in 7m 08s