logging.yml removes the RPCStackLogger which trimmed the unimportant RPC invokation frames from the displayed stack,
            replaces it with the simpler StackLogger which shows all frames.  RPCStackLogger was trimming too much
            after numerous changes to interceptors and RPC endpoint code.
r2demo.yml  now needs to include BETA scenario in its preload
Merge pull request #258 from newbrough/update_config

logging.yml removes the RPCStackLogger which trimmed the unimportant RPC...