Comment 2 for bug 1567807

To get an arm64 UEFI instance running, grab libvirt (minor apparmor patch) and aavmf (UEFI firmware) from https://launchpad.net/~wgrant/+archive/ubuntu/scalingstack-trusty-mitaka/, then boot a uefi1 arm64 image with the hw_firmware_type=uefi glance property set. But it's probably reproducible with amd64 UEFI instances too.

nova creates a libvirt instance with <loader> and <nvram> elements, and libvirt refuses to implicitly delete the nvram file. nova should probably be taught to force that, which is what my suggested delete_configuration patch does.