[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/51634522b262401ea35ac7e768e412... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3e6d8b126cf449978d07378705f875d2 : SUCCESS in 3m 44s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7fc3904f139e433fb429af530f74cb91 : FAILURE in 4m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/43ec87c5b733418bb76f81466b06e779 : SUCCESS in 3m 27s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5fe803668f97407cac7c7b068d448a5c : FAILURE in 2m 45s