[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/cab891126f57449caec68de011a921... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a0cbd8530073481bbc80aa6d19ae3019 : SUCCESS in 2m 50s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/32cba845b9f144f49273cea7dcc50d09 : FAILURE in 2m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/359f467822f64ec986c988750d84aaf7 : SUCCESS in 2m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/af05702ed93c4738906cda1a52686abe : FAILURE in 4m 11s