Fix compile error: declare ParseException on postForResponse

EntityUtils.toString() throws org.apache.hc.core5.http.ParseException
(checked). The try-with-resources refactor removed the catch(Exception)
wrapper that was absorbing it in the original post() method, so the new
postForResponse() must declare it.  Test callers already use throws Exception.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: robertlazarski

modules/json/test/org/apache/axis2/json/gson/UtilTest.java

@@ -29,6 +29,8 @@
 import org.apache.hc.core5.http.io.entity.EntityUtils;
 import org.apache.hc.core5.http.io.entity.StringEntity;
 
+import org.apache.hc.core5.http.ParseException;
+
 import java.io.IOException;
 
 public class UtilTest {
@@ -49,7 +51,7 @@ public TestResponse(int statusCode, String body) {
      * callers that test error paths need the response body even on HTTP 500.
      */
     public static TestResponse postForResponse(String jsonString, String strURL)
-            throws IOException {
+            throws IOException, ParseException {
         HttpEntity stringEntity = new StringEntity(jsonString, ContentType.APPLICATION_JSON);
         HttpPost httpPost = new HttpPost(strURL);
         httpPost.setEntity(stringEntity);