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

Build failed. https://zuul.opendev.org/t/openstack/buildset/2500dd71052e4706987d81f5225a01... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/96a108f99a3e4027969a05f5571d38f5 : SUCCESS in 3m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c2b17ad49ae64b0f9219fb6dd91442c1 : SUCCESS in 5m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/eaefbf2e6d774faeb27cf79032b2a736 : SUCCESS in 5m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/243bfb20768c42eb8fea9e28d8bf34a0 : FAILURE in 4m 38s