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/http/preseed.cfg b/ubuntu-16.04/http/preseed.cfg
index ed89955..a736274 100644
--- a/ubuntu-16.04/http/preseed.cfg
+++ b/ubuntu-16.04/http/preseed.cfg
@@ -1,6 +1,7 @@
 choose-mirror-bin mirror/http/proxy string
 d-i mirror/country string manual
 d-i apt-setup/use_mirror boolean false
+d-i base-installer/install-recommends boolean false
 
 d-i debian-installer/locale string en_US
 d-i debian-installer/language string en