[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/19c7e192dac747aa9e820787cc99d6... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/502661fbf75b4f72af262cc0aa5a11d3 : SUCCESS in 3m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fadaed0bf58f44eca2cafda44f766dde : SUCCESS in 5m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b05edaae9c614ec5ace39c86a8698899 : SUCCESS in 5m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/020982392e96410da12469c72f94b836 : FAILURE in 4m 51s