[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/831c2615832c425bbca00b6d341046... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7729e362ca3a445ead75aab80e17b84d : SUCCESS in 5m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4f3bc2ff989f4e96b18cb8def84899b8 : SUCCESS in 4m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ffedbaf0fd78444e91e343f343438c67 : SUCCESS in 5m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6cb6ca88b1a34954a3bf2708eb998f6c : FAILURE in 4m 45s