[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/e358d62772654b2fb8952b0fc33f6f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bc42dfdbea134d7fa03e3e14fdb7e7ef : SUCCESS in 3m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/935d02fc10f244fe85a5838e4b462c89 : FAILURE in 3m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7d96a846765947c2ab6994413ef5acd9 : SUCCESS in 3m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b599ae8cd2904c629df7a898e5edc75b : FAILURE in 2m 22s