[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/085e685cbdab4d678d020fc541b217... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e9c9fc9ece694b52ab760a773138c9d3 : SUCCESS in 4m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/15f202c70576467ebbc74303cb053975 : FAILURE in 4m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/58cafb3d2ce5499ab24192ad33b6c707 : SUCCESS in 3m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/033f777749b346cd8d0873f268528292 : SUCCESS in 4m 47s