Add data mode to performance.json (#166)

Author: kohrapha

validator/src/main/java/com/amazon/aoc/models/PerformanceResult.java

@@ -27,6 +27,7 @@ public class PerformanceResult implements Serializable {
   @NonNull private String testingAmi;
 
   @NonNull private String dataType;
+  @NonNull private String dataMode;
   @NonNull private Integer dataRate;
 
   // Calculated average statistics

validator/src/main/java/com/amazon/aoc/validators/PerformanceValidator.java

@@ -112,6 +112,7 @@ public void validate() throws Exception {
               validationConfig.getInstanceType(),
               validationConfig.getTestingAmi(),
               validationConfig.getDataType(),
+              validationConfig.getDataMode(),
               validationConfig.getDataRate(),
               avgCpu,
               avgMemory,