[Java RESTEasy client] updating test to use the Java RESTEasy echo api client (#17367) (#17470)

* updating test to use the Java RESTEasy echo api client (#17367)

* regenerated samples

* set source and target to 1.8 to fix workflow failure, adapted parser

samples/client/echo_api/java/native/docs/BodyApi.md

@@ -10,6 +10,8 @@ All URIs are relative to *http://localhost:3000*
 | [**testBodyApplicationOctetstreamBinaryWithHttpInfo**](BodyApi.md#testBodyApplicationOctetstreamBinaryWithHttpInfo) | **POST** /body/application/octetstream/binary | Test body parameter(s) |
 | [**testBodyMultipartFormdataArrayOfBinary**](BodyApi.md#testBodyMultipartFormdataArrayOfBinary) | **POST** /body/application/octetstream/array_of_binary | Test array of binary in multipart mime |
 | [**testBodyMultipartFormdataArrayOfBinaryWithHttpInfo**](BodyApi.md#testBodyMultipartFormdataArrayOfBinaryWithHttpInfo) | **POST** /body/application/octetstream/array_of_binary | Test array of binary in multipart mime |
+| [**testBodyMultipartFormdataSingleBinary**](BodyApi.md#testBodyMultipartFormdataSingleBinary) | **POST** /body/application/octetstream/single_binary | Test single binary in multipart mime |
+| [**testBodyMultipartFormdataSingleBinaryWithHttpInfo**](BodyApi.md#testBodyMultipartFormdataSingleBinaryWithHttpInfo) | **POST** /body/application/octetstream/single_binary | Test single binary in multipart mime |
 | [**testEchoBodyAllOfPet**](BodyApi.md#testEchoBodyAllOfPet) | **POST** /echo/body/allOf/Pet | Test body parameter(s) |
 | [**testEchoBodyAllOfPetWithHttpInfo**](BodyApi.md#testEchoBodyAllOfPetWithHttpInfo) | **POST** /echo/body/allOf/Pet | Test body parameter(s) |
 | [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
@@ -417,6 +419,140 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testBodyMultipartFormdataSingleBinary
+
+> String testBodyMultipartFormdataSingleBinary(myFile)
+
+Test single binary in multipart mime
+
+Test single binary in multipart mime
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        File myFile = new File("/path/to/file"); // File | 
+        try {
+            String result = apiInstance.testBodyMultipartFormdataSingleBinary(myFile);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testBodyMultipartFormdataSingleBinary");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **myFile** | **File**|  | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: multipart/form-data
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testBodyMultipartFormdataSingleBinaryWithHttpInfo
+
+> ApiResponse<String> testBodyMultipartFormdataSingleBinary testBodyMultipartFormdataSingleBinaryWithHttpInfo(myFile)
+
+Test single binary in multipart mime
+
+Test single binary in multipart mime
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        File myFile = new File("/path/to/file"); // File | 
+        try {
+            ApiResponse<String> response = apiInstance.testBodyMultipartFormdataSingleBinaryWithHttpInfo(myFile);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testBodyMultipartFormdataSingleBinary");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **myFile** | **File**|  | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: multipart/form-data
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyAllOfPet
 
 > Pet testEchoBodyAllOfPet(pet)