Closes #121 - Combined properties classes into FluoConfiguration

Pull request for #121

Fluo Configuration extends Apache Commons Configuration. Created unit test and updated
implementation to use new configuration class.  Added methods to verify
if configuration is set properly for client, admin, worker & oracle.
I had added this because an older version of commons config did not do environment interpolation.  I think the older version was coming from hadoop.  I noticed an explicit version was depended on, do you know if it supports this?