Added java and hadoop modules.

I extracted the openjdk-7 package from base_packages module into the
specialized java module.
The java module also applies a profile.d script that defines JAVA_HOME.

The hadoop module installs hadoop 2.5.0 using a custom rpm file.
I will upload this rpm to Google Drive or something and link it in the
project description.
To make things a little easier to follow, I added a *.goeshere file to
tell people where files need to be.

I also copied all of the config files from my VMGridTools project into
the hadoop module.
Any instances of the "centos-*" servers was replaced with puppet-test
for now.