[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/781ef062657645bda4cbaedb384d10... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8cb9ae4de65b4f3aa9b4a3ac41ef07ce : SUCCESS in 3m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/bdaba683bf5f4538806e34c2558aa70f : FAILURE in 3m 24s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/70a4c1a243b5437aab056e2ac20f9c30 : SUCCESS in 3m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/971174ad6c3a4a7db4b17b77692e1953 : FAILURE in 3m 32s