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/template.json.qcow2 b/ubuntu-16.04/template.json.qcow2
index ef20aaa..06e0fb3 100644
--- a/ubuntu-16.04/template.json.qcow2
+++ b/ubuntu-16.04/template.json.qcow2
@@ -107,7 +107,7 @@
     {
       "type": "vagrant",
       "keep_input_artifact": true,
-      "output": "images/{{ user `image_name` }}-{{.Provider}}-{{ isotime \"200601021504\" }}.box",
+      "output": "images/{{ user `image_name` }}-qemu-{{ isotime \"200601021504\" }}.qcow2",
       "except": [
         "digitalocean",
         "docker"