[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/503f0354a3d44b8e880876478990c7... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8c95f386a43545d19b45f5d23e1a6d1b : SUCCESS in 3m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a4968ab41e374d489f42cb4c08160ede : FAILURE in 3m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8a9a23fc365e45f3801d761bb8dd82e1 : SUCCESS in 3m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f73a547d8b6c4fcb9ef470eae2364d2f : FAILURE in 3m 13s