[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/ea77280c00b64c6393dda8fe886bb7... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8897c78453cc45249c5a1768b82cb981 : SUCCESS in 2m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4c68628586b344e99546d2a9f6a0f650 : FAILURE in 2m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5d0073bd842445b68677a9c942526498 : SUCCESS in 3m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ce2acd2056fa4a7eae9f3b5f87c1be6c : FAILURE in 3m 00s