CDAP-654: Added a unit test which tests Services integration with MapReduce
CDAP-654: addressed comments
CDAP-654: minor fixes
CDAP-654: changes in javadocs
CDAP-654: refactored setup method of mapper and reducer
CDAP-654: minor fixes
CDAP-654: added copyright
Merge remote-tracking branch 'upstream/release/2.6.0' into CDAP-654
CDAP-654: fixed checkstyle issues
Merge pull request #720 from cybervisiontech/CDAP-654

CDAP-654: Add a unit test which tests Services integration with MapReduce