training-guides/labs/lib/osbash at b2d5286996ca0f4d2f0c7e222b8799bac0639df9 - training-guides - OpenDev: Free Software Needs Free Tools

Exporting via cloned VMs leaves the exported disks and snapshots
registered with VirtualBox (whether or not we pass a "--register" flag
to clonevm). Moving the exported VMs away or trying to export again to
the same location makes VirtualBox complain.
If we register the cloned VM upon creation and then unregister it
afterwards, we get at least rid of the snapshots and have only the
base disk left to unregister manually. This rather complicated method
is implemented here.
The export VMs have "-e" attached to their names, making them easier to
unregister here. They are also easy to recognize when imported into a
VirtualBox that already has node VMs using the original names.
Change-Id: I4532fd3152e705c3b35265359d7e6b0d5facd55e