[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/2064297244fc4857ab570542af7f90... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b24e8efb39e5405baae7c3aab17ee033 : SUCCESS in 3m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b23356b9dd1e425491b01be68899010c : FAILURE in 3m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/abb9c1f1d5334ff3a6b5d3cca8bbae67 : SUCCESS in 5m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7fcbfa31b0914fa09a4d6ea6623fc60a : FAILURE in 3m 47s