[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/7f46fcec56ae434ab48eac4f836c09... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e195558b273046d8979dfac941627279 : SUCCESS in 3m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/682acd30bd234b43a59fecfdb0c0e57c : FAILURE in 3m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a7746a78d6b6480d8627dc2a85083439 : SUCCESS in 3m 18s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6601ff9df8eb4a1a9468bcfb6b5a89c8 : FAILURE in 5m 33s