Remove @response instance variable in QuickpayGateway.

git-svn-id: https://activemerchant.googlecode.com/svn/trunk/active_merchant@623 6513ea26-6c20-0410-8a68-89cd7235086d

CHANGELOG

@@ -1,5 +1,6 @@
 = ActiveMerchant CHANGELOG
 
+* Remove @response instance variable in QuickpayGateway. [cody]
 * Remove @response instance variable in PsigateGateway. Don't use billing address for shipping [cody]
 * Remove @response instance variable in PaypalGateway. Don't use billing address for shipping. [cody]
 * Remove @response instance variable in PayflowGateway [cody]

lib/active_merchant/billing/gateways/quickpay.rb

@@ -112,17 +112,17 @@ def add_reference(post, identification)
       end
 
       def commit(action, params)
-        data = ssl_post URL, post_data(action, params)
-        @response = parse(data)
+        response = parse(ssl_post(URL, post_data(action, params)))
 
-        success = @response[:qpstat] == APPROVED
-        message = message_from(@response)
-
-        Response.new(success, message, @response, 
+        Response.new(successful?(response), message_from(response), response, 
           :test => test?, 
-          :authorization => @response[:transaction]
+          :authorization => response[:transaction]
         )
       end
+
+      def successful?(response)
+        response[:qpstat] == APPROVED
+      end
 
       def parse(data)
         response = {}