Add import java util (#38)

Author: giou-k

README.md

@@ -97,6 +97,8 @@ import one.talon.api.IntegrationApi;
 import one.talon.api.ManagementApi;
 import one.talon.model.*;
 
+import java.util.*
+
 public class TalonApiTest {
     public static void main(String[] args) {
         Gson gson = new Gson();