Fix to use the useListener option to generate listeners

Author: nakamura-to

codegen/src/main/java/org/seasar/doma/gradle/codegen/task/CodeGenEntityTask.java

@@ -74,9 +74,11 @@ public void generate() {
     for (EntityDesc entityDesc : entityDescList.get()) {
       generateEntity(entityDesc);
 
-      EntityListenerDesc entityListenerDesc =
-          entityListenerDescFactory.createEntityListenerDesc(entityDesc);
-      generateEntityListener(entityListenerDesc);
+      if (entityDesc.isUseListener()) {
+        EntityListenerDesc entityListenerDesc =
+            entityListenerDescFactory.createEntityListenerDesc(entityDesc);
+        generateEntityListener(entityListenerDesc);
+      }
     }
   }