Report correct host a table split is assigned to for MR Jobs
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                 Key: HBASE-675
                 URL: https://issues.apache.org/jira/browse/HBASE-675
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Billy Pearson
            Priority: Minor
             Fix For: 0.3.0


Currently we return a null String array to the MR framework to use a random 
node for MR job assignment.

class: org.apache.hadoop.hbase.mapred.tableSplit
function getLocations()

We should be able to query the meta now for the current host name of the server 
hosting the region in question.
This will help with scaling as there will be less cross server communication 
removing bandwidth as a bottleneck.

The side effect of fixing this will help from overloading region servers with 
lots of MR clients all pulling from the same region server while theres work 
local for them to do.



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