[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/910b2e55404d4be39ff52215aa6f1d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/41695c5e54ed413fabad2000c40410a1 : SUCCESS in 7m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a942910eb4da4993b7715b7cddbf73b3 : SUCCESS in 4m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1f1fe511179c4029b1969acd10db23ca : SUCCESS in 3m 26s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a1cfebc224b145f482707268d43a4d48 : FAILURE in 3m 55s