Description of problem:
Using the API I am unable to list networks and nics for all vms with a single API call.  These collections are off of the vm.hardware association and can be added to the base vm_or_template model to allow this.

Version-Release number of selected component (if applicable):
master

How reproducible:
100%

Steps to Reproduce:
1. curl --user admin:smartvm 'http://localhost:3000/api/vms?expand=resources&attributes=name,networks,nics,disks,lans'

Actual results:
{
    "error": {
        "kind": "bad_request",
        "klass": "Api::BadRequestError",
        "message": "Invalid attributes specified: networks,nics"
    }
}

Expected results:
returns networks and nics with the vm data

Additional info: