Installer - Updating Hadoop Location

commit c5a0f2526f9414ad4a8f5bd84c8565911801e245
Author: Nick Holub <nikholub@gmail.com>
Date:   Thu Mar 6 12:28:44 2014 -0800

    fix #MLHR-864 Installer - Handling Hadoop Not Found

commit 3d8db770d32516c7d717590e2eafa354cf784419
Author: Nick Holub <nikholub@gmail.com>
Date:   Thu Mar 6 11:36:22 2014 -0800

    fix #MLHR-864 Installer - Handling Hadoop Not Found