[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/c49cf6706ab945f7a4ba160a458715... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/29ff48f3145f478c9db44e846862a3ac : SUCCESS in 5m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/430ce57c80d24d6180675337c5d8856b : SUCCESS in 6m 45s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d6b52b874f574cb7842fa8c1d0c5473e : SUCCESS in 6m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e732417641b548419940ed2bd5a7e155 : FAILURE in 5m 54s