Updated multinode example

Updated the multinode example to download the modules before setting up
the virtual machines.
Merge pull request #49 from puppetlabs/update_multinode

Updated multinode example
Ubuntu 12.04 bug fixes

The database needs to be restarted to attach to the correct bind
address. Erlang does not need to be installed explicitly on Ubuntu.
Merge pull request #52 from hogepodge/ubuntu_fixes

Ubuntu 12.04 bug fixes