Currently, users do not have any way of knowing what networks
are available for use, and in some scenarios such as when a
user wants to add a fixed IP, they do not have access to the
network ID.
This exposes a limited amount of information through the
existing networks extension for users and fixes LP Bug #1003979
Change-Id: I14cc3a377ee0f031b4edaf7eeec3a6550a402b1a