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

Build failed. https://zuul.opendev.org/t/openstack/buildset/a4d79488ed724f3280648ca8de7fbf... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ed11bcc7747c4f6985dcf1f390b65d39 : SUCCESS in 3m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1c7aedec51ca486c97c4547353220ad5 : RETRY_LIMIT in 2m 47s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/39a8c01a9a0e44e5b174467c3d3811ea : SUCCESS in 3m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/630d85e9d029402cb56e5ee40cb50af7 : SUCCESS in 3m 30s