Add feature to see the raw http status numerical code.

@@ -418,10 +418,13 @@ public class DirectControlServlet extends HttpServlet {
             Map<String, Object> result = dispatcher.runSync(serviceName, context);
 
             result.remove("responseMessage");
+            Integer httpStatusCode = (Integer) result.remove("httpStatusCode");
+            int statusCode = httpStatusCode == null ? 200 : httpStatusCode.intValue();
 
             if (result.get("errorMessage") != null) {
-                response.setStatus(400);
+                statusCode = 400;
             }
+            response.setStatus(statusCode);
 
             // Set to expire far in the past.
             response.setHeader("Expires", "Sat, 6 May 1995 12:00:00 GMT");