[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/d3fc9691e3134f83889b2e02e093b1... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d9b04ff761294d8aa48655e39fee12e0 : SUCCESS in 3m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1a92e35c30d6473383a4ce764426a49b : SUCCESS in 4m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4ba1ea7e20d64d7293e88e01558fb23d : SUCCESS in 4m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/665b15df1bc946bf8e9cf06640fd2300 : FAILURE in 3m 51s