#1460 - ENH: Add FetchGroup ... as a mechanism to specify select() + fetch() separately from Query

Change to add generics for FetchGroup

src/main/java/io/ebeaninternal/server/query/DFetchGroup.java

@@ -6,7 +6,7 @@ import io.ebeaninternal.server.querydefn.SpiFetchGroup;
 /**
  * Default FetchGroup implementation.
  */
-class DFetchGroup implements SpiFetchGroup {
+class DFetchGroup<T> implements SpiFetchGroup<T> {
 
   private final OrmQueryDetail detail;