use generated getters/setters instead of private access in JobQueueCh…

…angeEvent

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/jobhistory/JobQueueChangeEvent.java

@@ -31,8 +31,8 @@ public class JobQueueChangeEvent implements HistoryEvent {
   private JobQueueChange datum = new JobQueueChange();
 
   public JobQueueChangeEvent(JobID id, String queueName) {
-    datum.jobid = new Utf8(id.toString());
-    datum.jobQueueName = new Utf8(queueName);
+    datum.setJobid(new Utf8(id.toString()));
+    datum.setJobQueueName(new Utf8(queueName));
   }
 
   JobQueueChangeEvent() { }
@@ -54,13 +54,13 @@ public void setDatum(Object datum) {
 
   /** Get the Job ID */
   public JobID getJobId() {
-    return JobID.forName(datum.jobid.toString());
+    return JobID.forName(datum.getJobid().toString());
   }
 
   /** Get the new Job queue name */
   public String getJobQueueName() {
-    if (datum.jobQueueName != null) {
-      return datum.jobQueueName.toString();
+    if (datum.getJobQueueName() != null) {
+      return datum.getJobQueueName().toString();
     }
     return null;
   }