Add growlvm module

The module is aimed to extend logical volumes according to sizes
provided in image layout.

python growlvm.py --image-layout '{"home1": {"size": "1G", "resizefs": false}}'

The module support resizing for LVM volumes:

  * Only exact sizes specified in units M,G,T
  * % from total space on VG

Related-Prod: PROD-24537

Change-Id: Ia46a33855c44c6edba600efaaf4156f71668bc80
diff --git a/ubuntu-16.04/template.json b/ubuntu-16.04/template.json
index 10f84df..3ac2970 100644
--- a/ubuntu-16.04/template.json
+++ b/ubuntu-16.04/template.json
@@ -101,6 +101,11 @@
       "type": "file",
       "source": "files/etc/",
       "destination": "/etc"
+    },
+    {
+      "type": "file",
+      "source": "files/scripts/",
+      "destination": "/usr/bin"
     }
   ],
   "post-processors": [