[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/3e5fbce05051413ba326291a133b81... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8a4f0b9e00ab45dfb21828a3bd6115c6 : SUCCESS in 3m 22s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fe576b15650b4eab8f757015f71e2bfc : FAILURE in 3m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8a9f9377a69b4c8eb36327008619cc3c : SUCCESS in 3m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b58f7595bef5451eb726ac82050dd3fa : FAILURE in 3m 55s