[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/84d62ecfd6e04b579da72fddafa1d7... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bd8e3402056e4f4887977b85bb829885 : SUCCESS in 2m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/47fd4399ee6441b0b6eafb30ba9a1a8e : SUCCESS in 3m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8f9066e4acea4d688ffa20c55f67ec7e : SUCCESS in 4m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d31c8b6b6abc40ef8dc7641594fdbee1 : FAILURE in 2m 51s