[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/3826329c285242869db961e73f92b4... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7f26e91e5f5b40b4a7e7948ad562412f : SUCCESS in 4m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9bbadbd4b96f4964985d7f78e6bd8df6 : FAILURE in 4m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f3934c7e80a0401d92813ed745ff0db0 : SUCCESS in 3m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/96a21f5ab8b042a7a631c067555282bf : FAILURE in 3m 29s