mitchellh/packer — pull request #883 by b2jrock (2014-02-12 23:43:09+00:00)
Title: Add import_opts to the virtualbox-ovf builder. 

My use case is that I have existing virtualbox virtual machines where I need to keep the mac
addresses so that the network interfaces come up when packer boots them.
Otherwise I just get SSH timeout and I'm unable to configure the machines.