[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/16b6d30b8b77434caa7da55138950c... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8397a238642145c592d9b64e903ded10 : SUCCESS in 3m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/163754961c6a44f49d552cb13c88c602 : FAILURE in 3m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9792f4e381794135a1e7c221df275b94 : SUCCESS in 2m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fc12800b5ae64a18a857a9ddcc7008f0 : FAILURE in 2m 49s