metadata: Populate CloudSigma's IPs properly

Because instead of generating UUIDs for the IPs the IP by itself could be used instead. It will be unique for sure. I agree it's not quite correct, but it's not something that could (or will) be changed. So we have to live it with. Now the question is again if we want to name it `Address` in this project? (I still would prefer to NOT do this, but still the call is yours) :)