Add group parameter support to PHP client (#1337)

* add group parameter support to php template

* more update for group parameter

* fix call to protect function

* fix missing $

* update based on feedback

* create fake endpoint to test group parameters

* sync fake petstore spec v2, v3

* fix php doc for group parameters

* update petstore samples

* update fake petstore spec v2

* update petstore samples

* fix spec and update samples

samples/client/petstore/java/rest-assured/docs/FakeApi.md

@@ -13,6 +13,7 @@ Method | HTTP request | Description
 [**testClientModel**](FakeApi.md#testClientModel) | **PATCH** /fake | To test \"client\" model
 [**testEndpointParameters**](FakeApi.md#testEndpointParameters) | **POST** /fake | Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
 [**testEnumParameters**](FakeApi.md#testEnumParameters) | **GET** /fake | To test enum parameters
+[**testGroupParameters**](FakeApi.md#testGroupParameters) | **DELETE** /fake | Fake endpoint to test group parameters (optional)
 [**testInlineAdditionalProperties**](FakeApi.md#testInlineAdditionalProperties) | **POST** /fake/inline-additionalProperties | test inline additionalProperties
 [**testJsonFormData**](FakeApi.md#testJsonFormData) | **GET** /fake/jsonFormData | test json serialization of form data
 
@@ -413,6 +414,49 @@ No authorization required
  - **Content-Type**: application/x-www-form-urlencoded
  - **Accept**: Not defined
 
+<a name="testGroupParameters"></a>
+# **testGroupParameters**
+> testGroupParameters(stringGroup, booleanGroup, int64Group)
+
+Fake endpoint to test group parameters (optional)
+
+Fake endpoint to test group parameters (optional)
+
+### Example
+```java
+// Import classes:
+//import org.openapitools.client.ApiClient;
+//import io.restassured.builder.RequestSpecBuilder;
+//import io.restassured.filter.log.ErrorLoggingFilter;
+
+FakeApi api = ApiClient.api(ApiClient.Config.apiConfig().withReqSpecSupplier(
+                () -> new RequestSpecBuilder()
+                        .setBaseUri("http://petstore.swagger.io:80/v2"))).fake();
+
+api.testGroupParameters().execute(r -> r.prettyPeek());
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **stringGroup** | **Integer**| String in group parameters | [optional]
+ **booleanGroup** | **Boolean**| Boolean in group parameters | [optional]
+ **int64Group** | **Long**| Integer in group parameters | [optional]
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
 <a name="testInlineAdditionalProperties"></a>
 # **testInlineAdditionalProperties**
 > testInlineAdditionalProperties(requestBody)