Test for #110 - BeanSet of sub type with inheritance has null listen mode

src/test/java/com/avaje/tests/model/basic/Cat.java

@@ -6,9 +6,9 @@ import javax.persistence.Entity;
 @Entity
 @DiscriminatorValue("CAT")
 public class Cat extends Animal {
-
+  
   String name;
-
+  
   public String getName() {
     return name;
   }