增加限制，用户已保存的联系人>=2时，不允许再保存联系人信息

src/main/java/cn/quantgroup/xyqb/controller/external/user/InnerController.java

@@ -202,7 +202,7 @@ public class InnerController {
         }
         List<Contact> contacts = contactService.findByUserId(userId);
         if(null == contacts || contacts.size() == 0) {
-            return JsonResult.buildSuccessResult(null, Collections.emptyList());
+            return JsonResult.buildErrorStateResult(null, Collections.emptyList());
         }
         return JsonResult.buildSuccessResult(null, ContactRet.contacts2ContactRets(contacts));
     }