[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/b432dfb3f45c48e8bf7a097a061682... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1bd159a8b86e406a9e148b352cc10bad : SUCCESS in 3m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e122c609bf154d4687df4e3ab3cc4bc9 : FAILURE in 3m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0ccf826db04e4c13a9669ceb22d80a1e : SUCCESS in 3m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3a6d18b642c4494d9780170334e86531 : FAILURE in 3m 03s