[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/e3da902b2c694c40ba0c3c3ccfed3e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f889a23b1a5a490eb3c422f6786fb94a : SUCCESS in 4m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1cf752c293c94db39d97e2a11b15a383 : SUCCESS in 4m 24s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2f0d8336ae96439fb709daaa8de3a698 : SUCCESS in 5m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6567defe3b5d4473985d8a10b521683b : FAILURE in 4m 00s