[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/5a6093841eb94d69b13c04a216caaa... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9d59c666970f420e991a2c9082ea9184 : SUCCESS in 5m 33s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e99d0d10160d462cb371e31cfcd41910 : SUCCESS in 4m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ec9b8d7251e74fb8bfb6b8b5feb2a865 : SUCCESS in 4m 50s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f720bab5dca94727acccbfc0558e67c5 : FAILURE in 4m 26s