Make ledgerService the top level service
Currently the node has its own domain with each service as a subdomain under it. The node also has an undocumented feature, which returns its name when pinged. Better to put the ledger service at the node level and call that the 'public' API, and the policy and Blogic services as subdomains under it using an 'internal' API. This will have major ramifications for setup, but should simplify it slightly. Demo site would need rebuilding.