[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/f8b758ba3cc943118e96db40dd2229... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/db8bc3e202ba44139d388bc69023df19 : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1e3180fb9657492aa512bf70217e2035 : FAILURE in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f9e16c125b3d4db786a1c230990f3ddf : SUCCESS in 3m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2ce6f304b7394c2e993bf3b76ca529cf : FAILURE in 3m 02s