libxtreemfs-java: Added interface call for getting information about the...

libxtreemfs-java: Added interface call for getting information about the locations of stripes. Will be used for HDFS interface. 

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2965 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534