[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/928e2d2f30944dbca575697c042594... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d9773600a233474fab97540a2e99ed39 : SUCCESS in 4m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2ae561fe8dc4403eaa49ecef51112b09 : FAILURE in 4m 48s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/32ad4778aad24f64a99603097455796c : SUCCESS in 3m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6fd1721bf09245b19467808f2bca4b7f : FAILURE in 4m 59s