Documentation changes for TimelineV2Client

    // Create and start the Timeline client v.2
    TimelineClient client = TimelineClient.createTimelineClient(appId);
    client.init(conf);
    client.start();

    try {
      TimelineEntity myEntity = new TimelineEntity();
      myEntity.setEntityType("MY_APPLICATION");
      myEntity.setEntityId("MyApp1")
      // Compose other entity info

      // Blocking write
      client.putEntities(entity);

      TimelineEntity myEntity2 = new TimelineEntity();
      // Compose other info

      // Non-blocking write
      timelineClient.putEntitiesAsync(entity);

    } catch (IOException e) {
      // Handle the exception
    } catch (RuntimeException e) {

    amRMClient.registerTimelineClient(timelineClient);