Return json response where possible

Previous implementation returned string

Author: Suven-p

templates/go/client.go.twig

@@ -36,7 +36,7 @@ type ClientResponse struct {
 	Status     string
 	StatusCode int
 	Header     http.Header
-	Result     string
+	Result     interface{}
 }
 
 func (ce *{{ spec.title | caseUcfirst }}Error) Error() string {
@@ -312,7 +312,7 @@ func (clt *Client) Call(method string, path string, headers map[string]interface
 			Status:     resp.Status,
 			StatusCode: resp.StatusCode,
 			Header:     resp.Header,
-			Result:     string(output),
+			Result:     jsonResponse,
 		}, nil
 	}
 	output, err := getOutput(params, fileNameKey, responseData, resp.Header.Get("content-type"))