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

Build failed. https://zuul.opendev.org/t/openstack/buildset/d5349423b51343978c4c83f88610e0... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/812325f8fb764b13b5ee1122adbb3c5d : FAILURE in 3m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a5392d8ff33344f0864cd32e1b984dc7 : FAILURE in 4m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e5961ab8034c457492269e371095ead8 : FAILURE in 2m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2442783a74fd439c8b08ca613c80688a : FAILURE in 3m 25s