[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/85e8d82cb76247aebd29311bab31d983 : SUCCESS in 7m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4054401ca4ff4246991de9a2cfdcb049 : FAILURE in 7m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/df29b664d6804cde984106b9d9d47e1f : FAILURE in 9m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0bc65eb0217849bfbc2152fc32f15cec : FAILURE in 8m 36s