[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/784c1e4eead642e2bfe47017828291... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9e176e6b66184527a491df98461ba6b0 : SUCCESS in 3m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/01708b2e5e3140948f761f11e84fca56 : SUCCESS in 5m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9792ae6a77a24548b9908030e20e689f : SUCCESS in 5m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/612dcefa85954369a958d1edf9c073ba : FAILURE in 4m 21s