TraceToOutput is not supported in JsonResponseHandler

[qaWskYer]

Realize optional supporting trace for JsonResponseHandler like this:

{
  "errors": [
    {
      "type": "Error",
      "message": "Error message",
      "code": 500,
      "file": "\/app\/User\/domain\/entities\/User.php",
      "line": 24,
      "trace": TRACE
    }
  ]
}

where TRACE as return of $exception->getTrace().