removed deprecated call for config server

Program.cs

			var autoResetEvent = new AutoResetEvent(true);
			var uri = new Uri(args[0]);
			var dashboard = new Dashboard(uri);
			var configurationServer = TfsConfigurationServerFactory.GetConfigurationServer(uri, new UICredentialsProvider());
			var configurationServer = TfsConfigurationServerFactory.GetConfigurationServer(uri);
			configurationServer.EnsureAuthenticated();
			// Start the TFS worker.