Use AHSClient in YarnClient when TimelineServer is running

In YarnClient, depends on whether we enable yarn.timeline-service.generic-application-history.enabled, the AHSClient will be used or not. But the AHSClientService is enabled by default when we start the TimelineServer which means we are able to get history information for applications/applicationAttempts/containers by using ahsClient when the TimelineServer is running. So, we do not have to rely on this deprecated configuration to get history information by using YarnClient.