The fix for UEFI machines was only applied on Fedora, not RHEL or other distros. Change-Id: I43b7a826b7049703b0ffd84ad44b93c912dc6b53
vm
Sets up a partitioned disk (rather than building just one filesystem with no partition table).
By default the disk will have grub[2]-install run on it. In case GRUB2 is not available in the system, a fallback to Extlinux will happen. It's also possible to enforce the use of Extlinux by exporting a DIB_EXTLINUX variable to the environment.