Mapreduce API should not use JobContext to set configuration information
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                 Key: ACCUMULO-267
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-267
             Project: Accumulo
          Issue Type: Bug
          Components: client
            Reporter: John Vines
            Assignee: Billie Rinaldi


JobContext specifically says that it is a read-only view of job information. 
Our inputformat's configuration calls take JobContext as an input, rip out the 
Configuration object, and writes to it.

Instead, calls should just take in a Configuration object directly (or a Job 
object, but that passes in more information than is needed, and can cause 
discrepancies depending on which mapreduce api).

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