[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/177fd9e08fc04122983b4d12477d3d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/28637e3acc7649aeac2865dabbc9fbdd : SUCCESS in 3m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5d99531d90304fae9e211c204e46f7f1 : FAILURE in 4m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7664f35b685b40028e61d1537c9187da : SUCCESS in 2m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a780cd0cf06d439ea82c15e880f2f856 : FAILURE in 3m 13s