[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/4baafc1274fb456fb7bb5463b65206... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ecd548e80206475d983f0a9ea638f2c1 : SUCCESS in 5m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a7f146552d314d7e97f571fbd059cc75 : SUCCESS in 5m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8e4b38fb296f483daadee01df4b1f76e : SUCCESS in 5m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/26097af1a10441a089fb6da7fc76f89a : FAILURE in 5m 52s