[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/b7bfbb70491a44f18643445c056504... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d74549b46ae646b3b0f622fa5268f3ed : SUCCESS in 3m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/32da5fb747fd4b499f15e4e627dc6b25 : SUCCESS in 5m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/67aeb34525a046bf827d1405a54a5ee6 : SUCCESS in 6m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5bac6169110842998f7d1415c1992d7b : FAILURE in 5m 50s