Neutron stage2

This is mostly:
- cleanup of old comments
- fixed, added params and re-aligned seeds.rb accordingly
- replaced pacemaker name with controller, because it just made sense

Also,
- moved the neutron_net and neutron_subnet stuff (that was commented in neutron::networker) to its own subclass.
This is not used by default, the subclass must be added on a controller
Anyway, it's not working because:
https://github.com/stackforge/puppet-neutron/blob/master/lib/puppet/type/neutron_subnet.rb#L29