Partial fixes for https://issues.cask.co/browse/CDAP-703 and https://issues.cask.co/browse/CDAP-460. Remainder of work will have to wait until 2.7.0.
use only one reducer in word count m/r
Merge branch 'develop' into feature/1-reducer
Merge branch 'feature/1-reducer' into develop
Update comments
Merge pull request #692 from caskdata/feature/2.6.0_doc_updates

(CDAP-703) Doc Changes due to unification of APIs: MapReduce and Service changes
Updated Spark job UI to display the collected metrics in blocks
addressed commits