[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/82969668bbf14c8980c3f3d44092c0... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0e42be23e48042d6adb2452934a5f308 : SUCCESS in 4m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ae6765e0b2e441dda9f899c05a76220a : SUCCESS in 4m 24s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/82b8184bb16c43d09b364a2a5cd1a6ba : SUCCESS in 5m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5aaff8fb81074bf588b80c954887f076 : FAILURE in 3m 53s