fix: num_of_records_per_req item in json config need less than 32768. current = 100000

tests/system-test/1-insert/manyVgroups.json

@@ -11,7 +11,7 @@
     "confirm_parameter_prompt": "no",
     "insert_interval": 0,
     "interlace_rows": 0,
-    "num_of_records_per_req": 100000,
+    "num_of_records_per_req": 10000,
     "databases": [
         {
             "dbinfo": {
@@ -73,4 +73,4 @@
             ]
         }
     ]
-}
+}
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