[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/1ac46599e2bc4685bc86738a7c5482... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b83d4f05c2984ab7839287e4a867a81c : SUCCESS in 3m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d7e09f924713482f867dc88787ea2f09 : FAILURE in 4m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e597311dfa70452dae0b6a223e0622e6 : SUCCESS in 3m 26s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/598503e509334e179deea595070090f9 : FAILURE in 3m 52s