fix #17258 - use model class only if it is generated (#17490)

* fix  #16797 and #15796 spring child constructor missing parent params

* root cause and update the DefaultCodegen.java to add missing property when with multi inheritance

* rollback SpringCodegen.java

* update samples

* rollback with master cause #16992 fixed this issue too

* still using orignal design

* catchup master

* catchup master

* catchup master

* fix

* add tests

---------

Co-authored-by: dabdirb <dabdirb@gmail.com>

samples/server/petstore/php-laravel/lib/app/Http/Controllers/FakeController.php

@@ -249,6 +249,30 @@ class FakeController extends Controller
 
         return response('How about implementing fakeBigDecimalMap as a get method ?');
     }
+    /**
+     * Operation testAdditionalPropertiesReference
+     *
+     * test referenced additionalProperties.
+     *
+     *
+     * @return Http response
+     */
+    public function testAdditionalPropertiesReference()
+    {
+        $input = Request::all();
+
+        //path params validation
+
+
+        //not path params validation
+        if (!isset($input['requestBody'])) {
+            throw new \InvalidArgumentException('Missing the required parameter $requestBody when calling testAdditionalPropertiesReference');
+        }
+        $requestBody = $input['requestBody'];
+
+
+        return response('How about implementing testAdditionalPropertiesReference as a post method ?');
+    }
     /**
      * Operation testBodyWithBinary
      *