[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/8f1078912c8046c5abc2f6dc3d20a2... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/289c9304776549378dcc92ccd47086a0 : SUCCESS in 3m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c456ba20a2b449179d5c97d29b182c6c : FAILURE in 2m 58s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d1686531ae9b4e45abb9425fbd18a83c : SUCCESS in 3m 00s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bc246850378b41a8b5fd9424fa6e4657 : FAILURE in 3m 01s