This script will help newcomers to run this script and deploy a simple
scenario of an OpenStack Cloud with Puppet OpenStack modules.
Change-Id: I559e5e0a0d21a02d04b3d999b77dee23bb38c341
* Move out some code from install_modules.sh to have a functions script.
* Update install_modules.sh script to use functions.
Change-Id: Ie87b8eac71d5edb555e9a1637bea84bc9e268497