[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/23461141fe964469a379a417f43412... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e3515ef1f53341cc915f23e2193ef8a2 : SUCCESS in 3m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3df28b6256a94ff283ce9b10dd7fc780 : FAILURE in 3m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/11e22ee26bf24142ba4001dfada5761c : SUCCESS in 3m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7b59f8cdb08347309d3e7c19c6c0fe59 : FAILURE in 3m 06s