Test directory structure is Refactored

[Sharad Agarwal]

After the commit of HADOOP-5135 (Separate the core, hdfs and mapred 
junit tests), the directory structure of src/test has changed. Folder 
src/test/org has been removed. All patches which touches a test case or 
add a new one, need to refactor their patches as per the new structure.

- Sharad