Fetch current container info before operations

This makes sure the client is always in sync with the server before
performing any type of operations on the container metadata.

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

cmd/ctr/attach.go

@@ -24,7 +24,7 @@ var taskAttachCommand = cli.Command{
 		if err != nil {
 			return err
 		}
-		spec, err := container.Spec()
+		spec, err := container.Spec(ctx)
 		if err != nil {
 			return err
 		}