DATACMNS-850 - ReturnedClass now does not consider core Java types DTOs.

We now completely ignore all core Java types (i.e. types with a package name starting with "java.") from being DTOs. This allows query methods to project on date time types, too.

src/main/java/org/springframework/data/repository/query/ReturnedType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -304,7 +304,7 @@ public abstract class ReturnedType {
 					!isPrimitiveOrWrapper() && //
 					!Number.class.isAssignableFrom(type) && //
 					!VOID_TYPES.contains(type) && //
-					!type.getPackage().getName().startsWith("java.lang");
+					!type.getPackage().getName().startsWith("java.");
 		}
 
 		private boolean isDomainSubtype() {