changing the output call of the mapper in the job instance
Added Join to jobflow.java
removing double emit in join
Merge branch 'master' of https://github.com/liranoz12/dsp

* 'master' of https://github.com/liranoz12/dsp:
  removing double emit in join
  changing the output call of the mapper in the job instance

Also fixed liran's merge.
Updated in/ test files
Updated in/ test files
Updated args index for all classes, to match with amazon.