[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/0bebfd48f24247a98d30657a050723... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2bb8c90514a94ba9953b2fd377c36e4c : SUCCESS in 3m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/525551e839c041c7935ce26419bbf59f : FAILURE in 3m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1af740d8a6f44bf1a11ae703991a4269 : SUCCESS in 3m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c0906be5f77f4dc995082f80780753c1 : FAILURE in 2m 35s