[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/2179ed9a167c446c82b1869c1c8857... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/046ee6d854244cfdac00aae08a4437e0 : SUCCESS in 3m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/dc69a12d972645978efa7cc15473b4fd : FAILURE in 3m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e5aacd65d4154c08bf4c0b740d861725 : SUCCESS in 3m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9752a1558bf9489580efbb7d8cc59b6f : FAILURE in 3m 39s