[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/b6150228951b41149cd16d34a3d1ba... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cb5179fbeaa745d1aec8a5a9134c0731 : SUCCESS in 3m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/22acd885b72643d49648a2568301ac9f : FAILURE in 2m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/553081505df344439426defffcfd29d3 : SUCCESS in 2m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b64f8b3b78b54c8e8a9aa6f02050f05c : FAILURE in 2m 46s