[BENTO-13] ensure `kudzu` is uninstalled on CentOS boxes

By default Vagrant uses a DNS proxy in it's NAT networking mode. This 
effectively shields the guest VM from DNS changes on the host. It also 
has the nice side effect of nuking hard coded `nameserver` values left 
over in `/etc/resolv.conf` from base box authoring time. 

The `kudzu` autoconfig service blocks this behavior though and does not 
allow `/sbin/dhclient-script` to add the DNS proxy server value to 
`/etc/resolv.conf`.

SIDE COMMENTARY - `kudzu` is a POS and was removed in CentOS 6+.
CentOS 5.9 cleanup.sh scripts should be symlink to .centos/cleanup.sh
Merge pull request #75 from opscode/BENTO-13

[BENTO-13] ensure `kudzu` is uninstalled on CentOS boxes