[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/86c971a9e1c24a5e8674e894400385... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/043e4719c0e6475597c841909ba55f7d : SUCCESS in 3m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d37acc503d414425b0304d785fb728bf : FAILURE in 3m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/fcea2847563d43cab5c62f241287fcef : SUCCESS in 3m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7d6ed842ee9346b39baee111ea5bce4b : FAILURE in 3m 35s