Nova has removed this file in I23c934d2b610a451d6ebbd4276721c455365cedc
from master which breaks the build.
Generate the file manually in nova using "tox -e genpolicy"
and include it. Note that this also renames
policy.json to policy.yaml. Rename reference to it as well.
Co-Authored-By: Andreas Jaeger <aj@suse.com>
Change-Id: I61d336f8d34c0dfddb8dee02ee0f9ce7248b25bf