[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/162d1913b26d4d3095defaf8f5b9d5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f45d565d36f042b689c699838e54b7fa : SUCCESS in 2m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/866f2c23eee04981a0e34743cb31b03f : FAILURE in 3m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4cc56ae15ca245029c492882cb172c70 : SUCCESS in 2m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/09483f9ba435447c83143d217fcb23b9 : FAILURE in 2m 46s