[Fix] the exception message when execute LS batch is inaccurate (#89)

src/main/java/com/alipay/oceanbase/rpc/mutation/BatchOperation.java

@@ -207,7 +207,7 @@ public BatchOperationResult executeWithLSBatchOp() throws Exception {
                     }
                 } else {
                     throw new IllegalArgumentException(
-                        "the operation in LS batch must be checkAndInsUp");
+                        "The operations in batch must be all checkAndInsUp or all non-checkAndInsUp");
                 }
             }
         } else {