fix "{{ user `qemu_display` }} for chef/bento#1375
fix "{{ user `qemu_display` }} for chef/bento#1375

Signed-off-by: SG <6955f8dcd427d82b14c6b6bfaac9b3e051cd1bd9@users.noreply.github.com>

chef/bento,chef/bento,chef/bento,norcams/bento,norcams/bento,norcams/bento