Feature description and context

To simplify the integration of OpenSearch, we want to eliminate the potential for a great deal of redundant code functions and references across our "main" classes. To do this, we'll start by taking functionality that is common across classes and creating a base class which these will inherit from.

Feature sign-off requirements

• Encounter.java, Occurrence.java, and MarkedIndividual.java behavior, methods, etc. unchanged.
• "fundamental" methods on above work from base class - probably abstracts that rely on above classes to return values -- including but not limited to:
  • getId() (String)
  • getVersion() (long) - each class above might have slightly different value this will be computed from, for example modified property (a date/time) on Encounter
• Comment all methods that should get replaced with this base class with ## DEPRECATED #509 - Base class

Architectural Design Notes

• will not change underlying column names in DB (for id)