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

Build failed. https://zuul.opendev.org/t/openstack/buildset/f742e8a50d874a9284f2507bbf7e33... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/99331c74960e43fab9a9d248fa7fea05 : FAILURE in 4m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/02d72e6f450b44b6b97240b6a5fc8351 : SUCCESS in 6m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0b981d3a66454abf94e50f4d1274e13d : SUCCESS in 3m 50s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/20267b7e7fda4b67bce64054ad880866 : SUCCESS in 3m 37s