YARN-9222. Print launchTime in ApplicationSummary

(cherry picked from commit 6cace58e212d3ee0aec988926a5a17c9cc58e645)
(cherry picked from commit bf760e7e81f8e02ad413c470fccf78aaa9cb9f86)
(cherry picked from commit 80a08c29adc9d07974bbe8087abcec750d5f7916)
(cherry picked from commit c71054c428b3abe00507792099e13a2dad337697)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAppManager.java

@@ -179,6 +179,7 @@ public class RMAppManager implements EventHandler<RMAppManagerEvent>,
           .add("appMasterHost", host)
           .add("submitTime", app.getSubmitTime())
           .add("startTime", app.getStartTime())
+          .add("launchTime", app.getLaunchTime())
           .add("finishTime", app.getFinishTime())
           .add("finalStatus", app.getFinalApplicationStatus())
           .add("memorySeconds", metrics.getMemorySeconds())

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestAppManager.java

@@ -826,6 +826,7 @@ public class TestAppManager{
     when(app.getState()).thenReturn(RMAppState.RUNNING);
     when(app.getApplicationType()).thenReturn("MAPREDUCE");
     when(app.getSubmitTime()).thenReturn(1000L);
+    when(app.getLaunchTime()).thenReturn(2000L);
     RMAppMetrics metrics =
         new RMAppMetrics(Resource.newInstance(1234, 56),
             10, 1, 16384, 64, 0, 0);
@@ -843,6 +844,7 @@ public class TestAppManager{
     Assert.assertTrue(msg.contains("Multiline" + escaped +"UserName"));
     Assert.assertTrue(msg.contains("Multiline" + escaped +"QueueName"));
     Assert.assertTrue(msg.contains("submitTime=1000"));
+    Assert.assertTrue(msg.contains("launchTime=2000"));
     Assert.assertTrue(msg.contains("memorySeconds=16384"));
     Assert.assertTrue(msg.contains("vcoreSeconds=64"));
     Assert.assertTrue(msg.contains("preemptedAMContainers=1"));