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

Build failed. https://zuul.opendev.org/t/openstack/buildset/fe238fb6a1544f088930492b1e909b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0575b02b84794085830ce765ab16e45c : FAILURE in 3m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/969f37c595314d0fb082ed5bb3260a05 : FAILURE in 3m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8d9412a8b58d4c04a29c3941198ec2ed : FAILURE in 3m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/cc6b510a49164c429afdc4b947edad93 : FAILURE in 2m 49s