[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/a44cf3730d4b45189dde02cc2e43a1... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fa4a388a40f34e63b7c74c384584ef1d : SUCCESS in 3m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/94fb3172a9ff4b41a43ace45f0609084 : FAILURE in 3m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d0a2670ed7094d30bc0f5da8d99b8f9e : SUCCESS in 3m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c86c361e8106453582de162aa6a7585a : FAILURE in 2m 43s