This is a necessary but not complete step towards supporting Fedora and Suse
distributions. Further work is needed (e.g. to quiesce daemons on
installation).
Change-Id: If3ea6093d41a21de755db52328226b84b5a3ede6
It makes more sense for grub to be installed by the vm element, since
that is intended to produce directly bootable disk images.
Change-Id: Ic340ba9d3ec4dbeea3aed3576fc899c1424783a2