[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/85e19d2f7d2a4cc19380261d280da4... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e91b98ab279b451c89981d4ce42722d2 : SUCCESS in 3m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7657983660b147f99243bf26ce50e925 : FAILURE in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1e8a8ddff20d4455ba85f4cfcbed34bb : SUCCESS in 3m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a8afba94867746589795cb2eabd6a9f1 : FAILURE in 2m 45s