VirtualBox provisioning and capture.

[David Hutchins]

Provisioning and capture are working. The module only supports localdisk
mode at the moment, but network storage support should be trivial at this
point. If anyone wants to test this, feel free to contact me with questions.
The code is currently attached to JIRA issue VCL-417, at
https://issues.apache.org/jira/browse/VCL-417 . vcl.pm will have to be
patched with the two patches, provisioning patch then capture patch. and
utils.pm will need the provided patch.