* #62 - Added a Force copy flag in case the hadoop cluster is version 2*...


* #62 - Adding an optional -f flag to hadoop copy commands in case of hadoop2 clusters.
* #67 - Added retries while updating the job to status running after successful launch.
* Changed scripts to create a sample cluster with version 2.4.0.
As i said we will rethink how db transactions are retried in genie2. This fix is to alleviate the symptom for now. I am not sure if this will surely work, and the deadlock scenario itself is difficult to reproduce and test. But my code path of retry should be harmless most cases as it will only get triggered in a single scenario, and hence it isolates the fix for now without affecting it system wide, which would require a lot more testing,which we plan to do in genie2.