Closes #89 Allowing OracleApp to configure multiple oracle instances in ...

...yarn
Unfortunately.. the Oracle and Worker both use AppOptions.  If there are oracle specific options, there should be two classes now  OracleOptions and WorkerOptions.  They could just duplicate AppOptions initially or AppOptions could become abstract class with shared options between the two.  I don't care either way.  I just don't like users seeing a -num-oracles as an option for the worker.