Always return / and /boot as the mount points imitating the default
Fedora installation. Use the first disk found, otherwise if no disk
device of type VIR_DOMAIN_DISK_DEVICE_DISK is present, return 0 mount
points.
Reviewed-by: NErik Skultety <eskultet@redhat.com>
Signed-off-by: NIlias Stamatis <stamatis.iliass@gmail.com>