Model changes so that the operating systems deployed by Hanlon are all consistent...
with these changes in place, ruby and openssh-server are installed on each system
during the initial install (instead of doing it in the initial install for some models
and as a post-install proces in the rest).  Also removes addition of the PuppetLabs
repository and installation of Facter from the post-install scripts for some of these
models (and converts over from using Facter to get the IP address of the system during
the post-install to using standard UNIX/Linux utilities).