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/client/petstore/javascript-apollo/docs/FakeApi.md

@@ -11,6 +11,7 @@ Method | HTTP request | Description
 [**fakeOuterNumberSerialize**](FakeApi.md#fakeOuterNumberSerialize) | **POST** /fake/outer/number | 
 [**fakeOuterStringSerialize**](FakeApi.md#fakeOuterStringSerialize) | **POST** /fake/outer/string | 
 [**fakePropertyEnumIntegerSerialize**](FakeApi.md#fakePropertyEnumIntegerSerialize) | **POST** /fake/property/enum-int | 
+[**testAdditionalPropertiesReference**](FakeApi.md#testAdditionalPropertiesReference) | **POST** /fake/additionalProperties-reference | test referenced additionalProperties
 [**testBodyWithBinary**](FakeApi.md#testBodyWithBinary) | **PUT** /fake/body-with-binary | 
 [**testBodyWithFileSchema**](FakeApi.md#testBodyWithFileSchema) | **PUT** /fake/body-with-file-schema | 
 [**testBodyWithQueryParams**](FakeApi.md#testBodyWithQueryParams) | **PUT** /fake/body-with-query-params | 
@@ -347,6 +348,51 @@ No authorization required
 - **Accept**: */*
 
 
+## testAdditionalPropertiesReference
+
+> testAdditionalPropertiesReference(requestBody)
+
+test referenced additionalProperties
+
+
+
+### Example
+
+```javascript
+import OpenApiPetstore from 'open_api_petstore';
+
+let apiInstance = new OpenApiPetstore.FakeApi();
+let requestBody = {key: null}; // {String: Object} | request body
+apiInstance.testAdditionalPropertiesReference(requestBody, (error, data, response) => {
+  if (error) {
+    console.error(error);
+  } else {
+    console.log('API called successfully.');
+  }
+});
+```
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **requestBody** | [**{String: Object}**](Object.md)| request body | 
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: Not defined
+
+
 ## testBodyWithBinary
 
 > testBodyWithBinary(body)