---
conf:
  # api-paste entrypoint neutron.api.versions:Versions.factory was deprecated in Queens
  # See https://docs.openstack.org/releasenotes/neutron/queens.html
  # This configuration is put in for pre-Queens release.
  paste:
    app:neutronversions:
      paste.app_factory: neutron.api.versions:Versions.factory
...