Adding cisco-n1kv support in astapor/foreman

I have made changes which required in foreman to install cisco nexus1000v plugin. I validated my changes with ICE HOUSE RDO in RHEL 7 controller and ICE HOUSE RDO in RHEL6.5
This isn't quite the right syntax here, you are actually pulling in the quickstack::neutron::controller, which is not what you want, you simply want to:
  $neutron_core_plugin = $quickstack::neutron::controller::neutron_core_plugin
And then use it elsewhere as needed in this file