[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/0da0e31528fc43f89d37d98e904f1f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d3e791c8aa064faf9313eec11f307ce2 : SUCCESS in 2m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f27588d4b37f4083bc1638767f6aa806 : FAILURE in 3m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/fcbd2ab8dd50463fb5495584fb78cb9b : SUCCESS in 2m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3cdbaab053894d208d4fa1d9baa303aa : FAILURE in 4m 34s