[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/afb643ed17bb4ed7bf9518eda4121f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9edac67b06e14e708b0f928e09283f5b : SUCCESS in 3m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f79121f8a78a4730a10e3b77fb9584fc : FAILURE in 3m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/baffdfc6687b4e9e97d3df5f7e9e5db2 : SUCCESS in 3m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2e21f0c92bc44399acab6eb0666b04b6 : FAILURE in 2m 53s