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

Build failed. https://zuul.opendev.org/t/openstack/buildset/c60dd9f4f1d644289701bc6d7ad4cb... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/27b4a394536044cea3abcf39399e396b : FAILURE in 3m 27s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c2a94ac8e0654208a1755bffca970a70 : FAILURE in 3m 22s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/52256ed1a1454e8aa77eaa5df0ae5c23 : FAILURE in 3m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6fdfb6e28ecc4fe0adda56949d68d788 : FAILURE in 3m 04s