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 might be a problem, as we just removed core_plugin from that params on this class, since the neutron server is not needed on the compute node.  This could be handled with a new param to say ovs needs to be installed on compute, or perhaps you could just pull the value from quickstack::neutron::controller::$neutron_core_plugin (which would be nice because it gets less params here and would just do the right thing)