Description of problem:

API error message when using a non-existing parameter is not helpful


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

Version Satellite 6.2.6


Steps to Reproduce:
1. [root@rhel7-3-server ~]# curl -H "Accept:application/json,version=2" -H "Content-Type:application/json" -X POST -u admin:password -k -d '{"architecture_id":"1","environment_name":"production", "domain":"example.com","domain_id":1 }' https://sat6-2.example.com/api/hosts | python -m json.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   172    0    78  100    94    618    745 --:--:-- --:--:-- --:--:--   746
{
    "error": {
        "message": "Domain(#74961060) expected, got String(#3712880)"
    }
}

Actual results:

{
    "error": {
        "message": "Domain(#74961060) expected, got String(#3712880)"
    }
}


Expected results:

"Unknown parameter" error.

Additional info: