Comment 8 for bug 1591186

I can try to pass all the required properties using the parameters option. However, here we have the nested heat templates, i.e., using the resource_registry to link the 'server_with_vol_and_fip.yaml' with the parent 'server_group.yaml' (as the new 'My::Server::WithVolumeFIP' resource).

I am not sure how can we pass this resource_registry using any other option, rather than using the env file ?