fixed valueof method to handle null value
Adding a retry loop while getting a filesystem object in a kerberized block. This is meant to get around the intermittent Hadoop failures.
Fixed a small bug in the retry logic for getting the FileSystem
Refactored some try catch blocks. Also returning VoldemortException back from fetch function instead of null. This improves Azkaban visibility.
Updating Version and release_notes for release 1.2.3
Merge pull request #126 from baepiff/CmdUtils/valueof/bug

fixed valueof method to handle null value
1) Remove the use of using jars in Hadoop while doing the Build phase
2) Added a prioperty voldemort.distributedcache to indicate  apath
controlled by azkaban to load jars into distributed cache
Exposed property names as constants
 Set the map-reduce tokens so that they can be delegated