[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/bb27ea5195d541388bbc65dbd2ff0a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/056912e5900a4de5ab9d5328f4aaff7d : SUCCESS in 3m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f06700abd4874d2d95203e7e2b711ced : FAILURE in 2m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3b076e885bae4e9987299495bfa73423 : SUCCESS in 3m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/378346daf845465793348738c9ba37b7 : FAILURE in 2m 59s