[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/53abc9e1382e478faea0e463912acc... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1bf1c677426b4b22a2a7b2d73650a45f : SUCCESS in 3m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b2eb7ba3b9664936baf06f4e096c430a : FAILURE in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e9148572ee0b4151917d8bd91f834b45 : SUCCESS in 4m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/dabb17ef4d2444a6b2874d27cb01a06c : FAILURE in 2m 45s