Fix ah config

test/ah_config.json

@@ -21,7 +21,7 @@
             "properties": {
                 "GroupNames": ["gr_none","gr_test"],
                 "StatisticsTimeWindow": [60],
-                "SubscribeRetryPeriod": [30],
+                "SubscribeRetryPeriod": [30]
             }
         }
     }