Remove redundant definition of updates

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Move generally useful event_wait code to lib

Fix a bug with the xenlight version while we're at it.

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Queue the VM.remove operation

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Merge pull request #77 from jonludlam/CA-134757

CA-134757