[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/2b9ae3f45df44d00ba30a2f21f96dd... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/46457ef8348d4e01ab5c7dda6fc78a68 : SUCCESS in 3m 34s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f4ae63e6159745208c1879ac3b0562f7 : SUCCESS in 3m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7a4d4a67abd6461f9eb96012d8392b45 : SUCCESS in 2m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/485a56c5b1204b6d99ffac46e8dbb4cb : FAILURE in 2m 58s