[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/0542a6dce9e04bada700c8ff4eb777... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5e55112579074e2ea85cf85a238be686 : SUCCESS in 2m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c3a81313498c4162b448ae8a40197a5a : FAILURE in 2m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7ba9bcf24fea43c5b601605259f58bdb : SUCCESS in 3m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/15acbf14c35448e08ff23cbbb6b052dc : FAILURE in 2m 35s