[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/65f41154f03241ee8851dd7a26b677... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cf285565e32b47acb86d966e6ed8efb8 : SUCCESS in 2m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/dd4c0e9c27a940e1ad1e937f32bb28e7 : FAILURE in 2m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d4f7e8bdb67e46769336fa3231fc6d5d : SUCCESS in 2m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9ec123c7203147e086d617bda7294f9d : FAILURE in 3m 19s