[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/73a359c27a964157a82bd042cb3fa2... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/60ac49f2c780425985c0447a57326ac7 : SUCCESS in 3m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8fbba95198ca4369ad0981dbb6fcfc77 : SUCCESS in 4m 37s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b318ab8f2ea84b81994edd49152210c9 : SUCCESS in 4m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/828d5fa62b0e4c2eaf9beaee8d12c17b : FAILURE in 4m 28s