MXS-1220: Take the resource handler into use

The resource handler system is now usable but it doesn't perform anything
useful. Although, this will allows it to be tested for correctness.

Minor fixes to HttpResponse output and renaming of functions.

server/core/maxscale/httpresponse.hh

@@ -39,7 +39,7 @@ public:
      * @param response Response body
      * @param code     HTTP return code
      */
-    HttpResponse(string response = "", enum http_code code = HTTP_200_OK);
+    HttpResponse(enum http_code code = HTTP_200_OK, string response = "");
 
     ~HttpResponse();
 
@@ -59,10 +59,7 @@ public:
     string get_response() const;
 
 private:
-    HttpResponse(const HttpResponse&);
-    HttpResponse& operator = (const HttpResponse&);
-
     string              m_body;    /**< Message body */
     map<string, string> m_headers; /**< Message headers */
-    http_code           m_code;    /**< The HTTP code for the response */
+    enum http_code      m_code;    /**< The HTTP code for the response */
 };