fix refund bug "input String"

src/main/java/au/com/royalpay/payment/manage/tradelog/refund/impls/RefundServiceImpl.java

@@ -221,7 +221,7 @@ public class RefundServiceImpl implements RefundService, ApplicationEventPublish
             operator.put("operator_id", partnerAccount.getString("account_id"));
             operator.put("operator", partnerAccount.getString("display_name"));
         } else {
-            operator.put("operator_id", manager.getIntValue("manager_id"));
+            operator.put("operator_id", manager.getString("manager_id"));
             operator.put("operator", manager.getString("display_name"));
         }
         boolean requireAudit = type == OperatorType.PARTNER && PartnerRole.getRole(partnerAccount.getIntValue("role")) == PartnerRole.CASHIER