[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/45cfd0524b2d408fa8b991ed49fc17... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e202217ab902435ba2158a020d337938 : SUCCESS in 3m 18s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7ff58e6494ec4decbc3245199c379f4a : FAILURE in 2m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a243d8d066b6411d903ba223b1c8b405 : SUCCESS in 3m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/35575f7bf05f474f893fc39baa074422 : FAILURE in 2m 57s