Revert to old "Adding controller" message

mininet/net.py

@@ -386,7 +386,7 @@ class Mininet( object ):
 
         if not self.controllers and self.controller:
             # Add a default controller
-            info( '** No controller defined, adding default controller\n' )
+            info( '*** Adding controller\n' )
             classes = self.controller
             if type( classes ) is not list:
                 classes = [ classes ]