[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/c0e176322c70424db0250b832fd58b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3788a9ed84ad44d5bb025ed596fc17a3 : SUCCESS in 4m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6af65d50100546e2b05f2c0270e8eee4 : SUCCESS in 5m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4daa6ac91c794eada206475ad0895c27 : SUCCESS in 7m 27s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3511ea5ce4c44e20862a92d106d9015e : FAILURE in 5m 29s