[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/27a723e0920941bfa206fbba2682eb... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8e248705c9a04e59addb71129940ddfa : SUCCESS in 2m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0c5285f2e8c942e3ad858e6ddcebe692 : FAILURE in 3m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8d0916d8e30c4e09a0e9bbd72c115360 : SUCCESS in 3m 25s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ac656aa4e71c4a79885fda02e76ceb4b : FAILURE in 2m 50s