Multiply updates

    * Fix output processing
      for predictable qemu artifact naming
    * install-recommends=false for ubuntu16
    * add zerofree for lvm case
    * Fix PACKER_ARGS pass

Change-Id: I023b73963aeb7c1d562dbc6b1e414363de913d90
diff --git a/ubuntu-16.04/run.example.sh b/ubuntu-16.04/run.example.sh
index 2ed17e0..7341ce7 100755
--- a/ubuntu-16.04/run.example.sh
+++ b/ubuntu-16.04/run.example.sh
@@ -25,6 +25,6 @@
 [ -f config-drive/cloudata.iso ] && rm -v config-drive/cloudata.iso
 mkisofs -o config-drive/cloudata.iso -V cidata -r -J --quiet config-drive
 # For qemu test-build:
-packer build -only=qemu -parallel=false -on-error=ask template.json
+packer build -machine-readable -only=qemu -parallel=false -on-error=ask template.json
 #rm -rf ~/.packer.d/