Add a diskimage-builder script that creates a Fedora 19 image.

Implements: blueprint lang-pack-examples

* Work Item: Define a disk image builder template for a Fedora 19 Java Tomcat
system. This installs tomcat 7 and openjdk 1.7

Change-Id: I4bbd167c1600ed81a29d0bf1508bb84479b9da1a