[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/439a0bb505d343c797ff56e17ad5a2... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ac41e8bccefd4d36b217462a0caa1ee9 : SUCCESS in 4m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9036319abfd747ecb58529aadfec9a02 : FAILURE in 3m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a1cbaabb516b4d6d8ef390f590855cce : SUCCESS in 4m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/291e0ead12e14ea897898faacb3de852 : FAILURE in 3m 36s