[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/5fc2124b546144b29c7be3157003aa... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f21941d82ff0456e817c416591828bab : SUCCESS in 3m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9f3b1058c7f64456840326c7cda24934 : FAILURE in 2m 59s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/68af00259baf401598295fb3ded9861f : SUCCESS in 3m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3bc1706d9dd6458694980e30d85e48cd : FAILURE in 2m 51s