[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/6a839b2ff06140c19c0038f67b989d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5b7672e5a9c84ecb837548b2a59914f1 : SUCCESS in 4m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/75fe5029977c4c2e922c18b04bad3df9 : SUCCESS in 5m 17s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f7dbbcdb6a9647e1a593dc6ca1125541 : SUCCESS in 4m 32s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5a48591c7451441b8f5e3fed86b1481c : FAILURE in 5m 08s