Updated to more correct relationship

[isaac-s]

At runtime, it doesn't matter whether the port is connected_to the network or contained_in, because the code looks for any kind of a relationship. So the original code works. However, it serves as a bad example because this relationship between a port and a network is incorrect. Among other things, a contained_in relationship between a port and a network would prevent the user from using scaling groups to include a Server and a Port in the same scaling group; that wouldn't pass validation, because Port would be contained_in a network and thus Server and Port have an ancestry conflict.