Allow setting Scan start/stop row individually in TableInputFormat
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                 Key: HBASE-5208
                 URL: https://issues.apache.org/jira/browse/HBASE-5208
             Project: HBase
          Issue Type: Improvement
          Components: mapreduce
            Reporter: Nicholas Telford
            Priority: Minor


Currently, TableInputFormat initializes a serialized Scan from 
"hbase.mapreduce.scan". Alternatively, it will instantiate a new Scan using 
properties defined in "hbase.mapreduce.scan.*". However, of these properties 
the "start row" and "stop row" (arguably the most pertinent) are missing.

TableInputFormat should permit the specification of a start/stop row as with 
the other fields using a new pair of properties: 
"hbase.mapreduce.scan.row.start" and "hbase.mapreduce.scan.row.end"

The primary use-case for this is to permit Oozie and other job management tools 
that can't call TableMapReduceUtil.initTableMapperJob() to operate on a 
contiguous subset of rows.

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