[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/d6b947cbbfa1418c9576aabeb69906... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/762d6d0777964deab2b8578f2516d039 : SUCCESS in 3m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9a103f81b04840e8b17accb7d7f110de : FAILURE in 2m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c9558f7492e347d69c81dc0c6a38279f : SUCCESS in 2m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b5ee5b22064b47468a4f67bcc070c5e3 : FAILURE in 2m 41s