Refactor newClient in ctr

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

cmd/ctr/pause.go

@@ -7,13 +7,11 @@ var taskPauseCommand = cli.Command{
 	Usage:     "pause an existing container",
 	ArgsUsage: "CONTAINER",
 	Action: func(context *cli.Context) error {
-		ctx, cancel := appContext(context)
-		defer cancel()
-
-		client, err := newClient(context)
+		client, ctx, cancel, err := newClient(context)
 		if err != nil {
 			return err
 		}
+		defer cancel()
 		container, err := client.LoadContainer(ctx, context.Args().First())
 		if err != nil {
 			return err