[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/e578c571d5564099992a329c8247e8... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/78da963e43ef42e691de32ac8bc5209c : SUCCESS in 3m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2d85312306984646b6dcc6e7cbd027b9 : FAILURE in 3m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/512d1c416009485e9312e1ac62ec0703 : SUCCESS in 3m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b14e55e40efc44bf89908494ccbc78f5 : FAILURE in 3m 19s