[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/1db5d7d8be014470ad6aee33d79a2c... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a2c762bf341f4ee58b67192b80fb93b4 : SUCCESS in 3m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/986e9274f0df4caf81b31ff398507c12 : FAILURE in 3m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8b4513709f334b249c47be52627510be : SUCCESS in 4m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fef0d40d591244e49d061b58bcf2f462 : FAILURE in 3m 08s