[QueryBeans] Fix for missing inherited properties when parent only has @DiscriminatorValue

A parent in the Inheritance hierarchy has @DiscriminatorValue but not the @Inheritance annotation. The bug means the inherited properties are not included on the generated query bean.

The fix is to the querybean-generator to pick up inherited properties for this case.

ebean-querybean/src/test/java/org/example/domain/ACat.java

@@ -2,15 +2,22 @@ package org.example.domain;
 
 import javax.persistence.DiscriminatorValue;
 import javax.persistence.Entity;
-import javax.persistence.Inheritance;
 
-@Inheritance
 @DiscriminatorValue("CAT")
 @Entity
 public class ACat extends Animal {
 
+  private String catProp;
+
   public ACat(String name) {
     super(name);
   }
 
+  public String getCatProp() {
+    return catProp;
+  }
+
+  public void setCatProp(String catProp) {
+    this.catProp = catProp;
+  }
 }