Add ability to persist application domain objects (entities) to multiple Regions in a GemFire Cache.

This "improvement" originated from users want the ability to persist their application domain objects (entities) to multiple Regions in the GemFire Cache.

One possible implementation was suggested in PR #55 where the @Region annotation is specified on the domain object/entity's Repository interface extension, used for data access and persistence operations to the underlying data store (e.g. GemFire), effectively overriding the entity's preferred Region with the @Region annotation on the entity's class, defaulting to the simple class name of the entity.

This "improvement" JIRA ticket is meant to track the progress on this development work.