[sheepdog] [PATCH 1/2] collie: add command 'collie vdi rollback'

[Dietmar Maurer]

> > >   $ collie vdi list test
> > >     Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
> > >   s test         1  4.0 GB  0.0 MB  0.0 MB 2012-08-31 13:05   7c2b25     1
> snap1
> > >   s test         2  4.0 GB  0.0 MB  0.0 MB 2012-08-31 13:06   7c2b26     1
> snap2
> > >   s test         3  4.0 GB  0.0 MB  0.0 MB 2012-08-31 13:07   7c2b27     1

Above one is no longer needed (7c2b27)?

> > >     test         4  4.0 GB  4.0 MB  0.0 MB 2012-08-31 13:08   7c2b28     1