DATACMNS-1095 - Made ObjectInstantiator public to avoid IllegalAccessErrors.

ObjectInstantiator needs to be declared public as otherwise loading the implementation class fails as it doesn't have access to the (package) private interface in a different classloader.

src/main/java/org/springframework/data/convert/ClassGeneratingEntityInstantiator.java

@@ -229,10 +229,12 @@ public class ClassGeneratingEntityInstantiator implements EntityInstantiator {
 	}
 
 	/**
+	 * Needs to be public as otherwise the implementation class generated does not see the interface from the classloader.
+	 * 
 	 * @author Thomas Darimont
+	 * @author Oliver Gierke
 	 */
-	private static interface ObjectInstantiator {
-
+	public interface ObjectInstantiator {
 		Object newInstance(Object... args);
 	}