cliff.interactive.InteractiveApp cmdloop does not call the correct method from parenc class

[Alvaro Lopez]

The cmdloop() method in cliff.interactive.InteractiveApp does not call the correct method from the parent class, as it calls the inner _cmdloop() therefore all the logic that cmd2 does is lost. Actually, the method can be dropped, as it does nothing, unless there is a good reason to drop all the logic the cmd2 cmdloop() method introduces. If this is the case, the documentation should be adjusted, as it is misleading.