fix rate_warning

src/main/java/au/com/royalpay/payment/manage/management/clearing/core/impl/CleanServiceImpl.java

@@ -618,7 +618,7 @@ public class CleanServiceImpl implements CleanService, ManagerTodoNoticeProvider
             Date expiryTime = client.getDate("expiry_time");
             client.put("generatable", expiryTime != null);
             if (expiryTime != null) {
-                client.put("expiry_time", expiryTime.getTime());
+                client.put("expiry_time", DateFormatUtils.format(client.getDate("expiry_time"), "dd/MM/yyyy"));
             }
         }
         warnings.put("no_rate", rateInDanger);