[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/ac35a4ec781e43438feca507e3438b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/91c7d8c7d3374f0391de6c448ac6bec5 : SUCCESS in 3m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9e8abc60fc614a4dae00e35ed7d76bd8 : FAILURE in 2m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/91f273463f714e7db6874ef7e8b42190 : SUCCESS in 3m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/80233749ae90493d9f9353226aeb0895 : FAILURE in 3m 12s