[sheepdog] [PATCH] sheep: don't try to get vdi bitmap when cluster not formated

[Christoph Hellwig]

On Wed, May 30, 2012 at 04:00:02PM +0800, Liu Yuan wrote:
> From: Liu Yuan <tailai.ly at taobao.com>
> 
> This will speed up nodes setup a lot for the first time

Looks reasonable, but it might be a better idea to list the status
values where we want to get the vdi list instead of the other way
around.

Given that we should never get here with SD_STATUS_JOIN_FAILED that
would be halt, and wait_for_join as old status values where to do it.