HH-51 Ensuring PATHS are acknowledged

-libhdfs classpath issues

-helpful error messages
Signed-off-by: Rodrigo Pastrana <Rodrigo.Pastrana@lexisnexis.com>
HH-84 Add support for hdfs user on read operations

Signed-off-by: rpastrana <rodrigo.pastrana@lexisnexis.com>
Merge pull request #56 from rpastrana/HH-51-Hadoop22

HH-51 Ensuring PATHS are acknowledged