[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/4cd05822ce3a4a31a0c8c61d9d39b5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/28cdcf780bd046d5b668cbf1c4fdb935 : SUCCESS in 3m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/230c6322dfd34f51b44c5931f3065d97 : FAILURE in 2m 59s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4cc8a7eff21b4a8d813bc9b465bbfeff : SUCCESS in 3m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e25e5570b45641deb3ef051dd53af70f : FAILURE in 3m 05s