fix vr tests, orig cleanup

Author: mediumTaj

examples/IBM.WatsonDeveloperCloud.VisualRecognition.v3.Example/VisualRecognitionServiceExample.cs

@@ -14,14 +14,15 @@
 * limitations under the License.
 *
 */
-using IBM.WatsonDeveloperCloud.VisualRecognition.v3;
+
 using IBM.WatsonDeveloperCloud.VisualRecognition.v3.Model;
 using IBM.WatsonDeveloperCloud.Http.Extensions;
 using System;
 using System.IO;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
+using Newtonsoft.Json;
 
 namespace IBM.WatsonDeveloperCloud.VisualRecognition.v3.Example
 {