[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/037d3c7f88ee473b8e773066fe9207... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/47e671b182114e6eba14b94c719c0c96 : SUCCESS in 3m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/97a9d222e61d4e3aba02a49360b00ff9 : FAILURE in 2m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b903332de143448b8499fcb2186afead : SUCCESS in 4m 18s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6eabc4e13a56444a81ff59c3f485ce95 : FAILURE in 4m 04s