[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/825228d2ed5f424d941a611f520cd0... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ce6de5cadcea4f99b81a3bbb1f8c772a : SUCCESS in 4m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7305ea3bd2c34919bc418288c48320f0 : SUCCESS in 4m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/73035be3069b42d49a16eeebecf03d14 : SUCCESS in 4m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/265b11206e5241efb05a465518c8379f : FAILURE in 3m 59s