[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/0c8363ff5e5547f69547f9bb8d36bf... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1ce413fa2fb246bea11ebcfd9eeb4f32 : SUCCESS in 3m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5d6d68feee1b4ad1b991b91f35dfab07 : SUCCESS in 4m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9f62b1781fb44c9a93b362f313ba2c25 : SUCCESS in 4m 32s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/45ba7b3d895f448db997865e804071f4 : FAILURE in 4m 30s