Add back in nova networking-based hostgroups.

Also rename them to make it more clear which is what.
Rename Neutron Hostgroups.

This is just to make it clear that they are different from the nova
networking-based versions.
Updates the setup to include the new neutron changes.

We need to populate the foreman db with the relevant info to
allow the user to use the new hostgroup for networker.
Merge pull request #5 from jguiditta/neutron_seeds

Neutron seeds