DATACMNS-300 - Fixed exception handling in ReflectionEntityInstantiator.

ReflectionEntityInstantiator now actually throws the wrapped exception created in the catch block handling BeanInstantiationExceptions.

Pull request: #25.

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

@@ -61,7 +61,7 @@ public enum ReflectionEntityInstantiator implements EntityInstantiator {
 					return BeanUtils.instantiateClass(entity.getType());
 				}
 			} catch (BeanInstantiationException e) {
-				new MappingInstantiationException(entity, Collections.emptyList(), e);
+				throw new MappingInstantiationException(entity, Collections.emptyList(), e);
 			}
 		}