[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/0f4c4c51c760490ca524adea880034... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4f20a95a92074b8bb2906beeaabcbbbb : SUCCESS in 3m 57s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8dacafd041b249a8984ad4d6290e17b1 : SUCCESS in 4m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/616114a8033647ddbce9d6aaf2000ed7 : SUCCESS in 3m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/227b35f9c65941208bc1958e17467921 : FAILURE in 3m 18s