block_resize: needs sleep a while when check the disk size after block_resize



Signed-off-by: Cong Li <coli@redhat.com>
Hi xu,

Thanks for your review.

As QMP is the async mode, and its return does not mention that block_resize has finished or not, so we can't judge whether the operation is completed, right?

2014-08-19 18:18:31: {"execute": "block_resize", "arguments": {"device": "drive_stg", "size": 24159191040}, "id": "cjd4Pu6W"}
2014-08-19 18:18:31: {"return": {}, "id": "cjd4Pu6W"}

If there is any problem, feel free to correct me.

Thanks,
Cong