[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/0e5cfacde4f74fc5ba3cd4c3683401... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1c62d548f95e47ada1ea649c84b9ee46 : SUCCESS in 3m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d778657fdda04425bec5159c96445950 : FAILURE in 2m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2beb1b7270ae4eb89ecdc7d60920979f : SUCCESS in 3m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8338bef08e06489aa5e5677b9fc14c10 : FAILURE in 2m 47s