[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/7fb2f3dfd7074b26b32745a6239ff5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/115cd40035ff4f718343983691aced39 : SUCCESS in 3m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f890c9f5397541b28a718abf6bb6519f : FAILURE in 3m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a08ee0a3414f44bd82b8160de940cfe2 : SUCCESS in 2m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a399882bdee04b0a88d32fd8361bed9e : FAILURE in 2m 36s