[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/5ef0d383e2864568af77be6f7b566443 : SUCCESS in 5m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3b27ff10b78949af91beb824e7e3911f : FAILURE in 4m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6563644d38d44658a5a810700e68f991 : FAILURE in 5m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c40a982bd6cc43cc8d2da7ff003d642c : FAILURE in 5m 23s