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
I think for whatever params you add here, it would be nice to have them as close as possible to alphabetical order to make it easier to read.