Not getting unregistered VM on the detached SD that has that VM lease

[sshmulev]

Found some issue regarding VM leases, this is the flow:

1. Create a new storage domain
2. Create a new VM without lease
3. Update the VM - add lease storage domain previously created
4. Start VM
5. Stop VM
6. Deactivate and detach the storage domain
   When the SD is detached I get a list of zero unregistered VMS on that SD.

On engine version 4.5.0.7-0.9 this worked and I got an unregistered VM at this point.