MAPREDUCE-6896. Document wrong spelling in usage of MapredTestDriver tools.

(Contributed by LiXin Ge via Daniel Templeton)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/test/MapredTestDriver.java

@@ -94,7 +94,7 @@ public class MapredTestDriver {
       pgd.addClass("gsleep", GrowingSleepJob.class,
           "A sleep job whose mappers create 1MB buffer for every record.");
       pgd.addClass("timelineperformance", TimelineServicePerformance.class,
-                   "A job that launches mappers to test timline service " +
+                   "A job that launches mappers to test timeline service " +
                    "performance.");
       pgd.addClass("nnbench", NNBench.class,
           "A benchmark that stresses the namenode w/ MR.");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/YarnClientImpl.java

@@ -350,7 +350,7 @@ public class YarnClientImpl extends YarnClient {
     }
     credentials.addToken(timelineService, timelineDelegationToken);
     if (LOG.isDebugEnabled()) {
-      LOG.debug("Add timline delegation token into credentials: "
+      LOG.debug("Add timeline delegation token into credentials: "
           + timelineDelegationToken);
     }
     DataOutputBuffer dob = new DataOutputBuffer();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestTimelineClient.java

@@ -242,8 +242,8 @@ public class TestTimelineClient {
     TimelineClientImpl client = createTimelineClient(conf);
     TimelineClientImpl clientFake =
         createTimelineClientFakeTimelineClientRetryOp(conf);
-    TestTimlineDelegationTokenSecretManager dtManager =
-        new TestTimlineDelegationTokenSecretManager();
+    TestTimelineDelegationTokenSecretManager dtManager =
+        new TestTimelineDelegationTokenSecretManager();
     try {
       dtManager.startThreads();
       Thread.sleep(3000);
@@ -492,10 +492,10 @@ public class TestTimelineClient {
     Assert.assertFalse("Reloader is still alive", reloaderStillAlive);
   }
 
-  private static class TestTimlineDelegationTokenSecretManager extends
+  private static class TestTimelineDelegationTokenSecretManager extends
       AbstractDelegationTokenSecretManager<TimelineDelegationTokenIdentifier> {
 
-    public TestTimlineDelegationTokenSecretManager() {
+    public TestTimelineDelegationTokenSecretManager() {
       super(100000, 100000, 100000, 100000);
     }