Multiply updates

  * Add simple post-processor,
    for predictable qemu artifact naming
  * install-recommends false for ubuntu16
  * Fix zerofree for lvm based

Change-Id: Ic87d0c5e9472894714294a27d4aef797474138c6
diff --git a/ubuntu-16.04/template.json b/ubuntu-16.04/template.json
index 7b87e75..71e67f3 100644
--- a/ubuntu-16.04/template.json
+++ b/ubuntu-16.04/template.json
@@ -132,6 +132,14 @@
       "only": [
         "docker"
       ]
+    },
+    {
+        "keep_input_artifact": false,
+        "output": "images/{{ user `image_name` }}.qcow2",
+        "type": "vagrant",
+        "only": [
+           "qemu"
+      ]
     }
   ],
   "builders": [