Fixed month value in JSON chart data.

tools/compile-results/src/main/java/moobench/tools/results/stages/JsonChartSink.java

@@ -43,7 +43,7 @@ public class JsonChartSink extends AbstractConsumerStage<Chart> {
             calendar.setTimeInMillis(value.getTimestamp() * 1000);
 
             objectNode.put("time", String.format("%d-%d %d:%d",
-                    calendar.get(Calendar.DAY_OF_MONTH), calendar.get(Calendar.MONTH),
+                    calendar.get(Calendar.DAY_OF_MONTH), calendar.get(Calendar.MONTH)+1,
                     calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE)));
             arrayNode.add(objectNode);
         }