nico.vanelslande 163e1997a6 Make virtualbox vm_exists? more resilient to VirtualBox transient failures.
We know that the vm does not exist if we get VBOX_E_OBJECT_NOT_FOUND.
For any other error, this may well be VirtualBox getting confused and it is probably
worth retrying...
2016-05-31 13:23:56 +01:00
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