[Openstack-stable-maint] Stable check of openstack/oslo.middleware for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/53d9bbdbae9845bab4e58a5f407515... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6e3a7fae14ad48558e67fecf9fb6c285 : SUCCESS in 4m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/959520a1321845cb83b730600200bc45 : FAILURE in 4m 22s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/05fea29be4b74d498c8f94406fc6f4d9 : SUCCESS in 5m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/be641ab0d4284e5083efbb7591b54369 : FAILURE in 2m 33s