[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/9a03bb673c5249229d4771ebcce6bd... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d33fa9334c6d4b6b8a22dfa31231a8d2 : SUCCESS in 2m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b442001c122c40f899b51872918adfc5 : FAILURE in 3m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ff21e6c58e2c48d3a92b3e1a27ea06ab : SUCCESS in 2m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4e5771b428544eb49e81c4a26e49591c : FAILURE in 3m 33s