HDDS-275. Add message output for succeeded -deleteVolume CLI. Contributed by Nilotpal Nandi.

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/ozShell/TestOzoneShell.java

@@ -249,6 +249,8 @@ public class TestOzoneShell {
     String[] args = new String[] {"-deleteVolume", url + "/" + volumeName,
         "-root"};
     assertEquals(0, ToolRunner.run(shell, args));
+    String output = out.toString();
+    assertTrue(output.contains("Volume " + volumeName + " is deleted"));
 
     // verify if volume has been deleted
     try {

hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/web/ozShell/volume/DeleteVolumeHandler.java

@@ -67,5 +67,6 @@ public class DeleteVolumeHandler extends Handler {
     }
 
     client.getObjectStore().deleteVolume(volumeName);
+    System.out.printf("Volume %s is deleted%n", volumeName);
   }
 }