removing the creation of shutdown files for CentOS builds
condensing vboxmanage value; removed shutdown file for debian boxes
removing shutdown script from fedora
removing shutdown scripts from ubuntu templates
Remove bash from the image. It was only needed for veewee validation.
Merge pull request #87 from tduffield/cleanup-shutdown-scripts

Cleanup shutdown scripts
Merge pull request #88 from juliandunn/remove-bash

Remove bash from the FreeBSD image.