Support for testing partitioners

[Lakshminarayana, Bhuvan]

Any update on below request :
https://issues.apache.org/jira/browse/MRUNIT-88?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#issue-tabs

I am also in need of feature of testing partitioners using MRUNit.


Thanks
Bhuvan