Fix remote controller param

bin/mn

@@ -201,7 +201,7 @@ class MininetRunner( object ):
         controller = CONTROLLERS[ self.options.controller ]
         if self.options.controller == 'remote':
             controller = lambda a, b: RemoteController( a, b,
-                             ipAddress=self.options.ip,
+                             defaultIP=self.options.ip,
                              port=self.options.port )
 
         if self.validate: