No longer default IP addresses to 127.0.0.1

This was causing problems in variouse places and is best not being
used as standard practice to allow an all in one to be expanded without
needing excessive config changes e.g.

https://bugzilla.redhat.com/show_bug.cgi?id=886541
https://bugzilla.redhat.com/show_bug.cgi?id=892318

Change-Id: I15e0201e278db0918ee820825ea0c62d3a54d7b6
No longer ask user to provide a Horizon secret

There was no reason this shouldn't be a random string

Change-Id: I534593e4e12a2c187f1a57d04d9345186abdcd6a
Merge "No longer ask user to provide a Horizon secret"
Merge "No longer default IP addresses to 127.0.0.1"