[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/b75bd9647f9648ba8d7e91e5fde296... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4376745bb44142b3abf5c1090a66be59 : SUCCESS in 3m 40s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b65f5a0556db4436b1c32402838dc7f0 : FAILURE in 2m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e47a271d98b3404ea128cd7f6b4f64d3 : SUCCESS in 2m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/034689a00bab4bec97398bbd5aa4ef2a : FAILURE in 2m 37s