Build version verification on DataNode should be returned back
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                 Key: HADOOP-1567
                 URL: https://issues.apache.org/jira/browse/HADOOP-1567
             Project: Hadoop
          Issue Type: Bug
    Affects Versions: 0.13.0
            Reporter: Konstantin Shvachko
            Assignee: dhruba borthakur
             Fix For: 0.14.0


HADOOP-1269 removed build version verification from DataNode.handshake() method.
I think this was done by a mistake.
Build version consistency of the name-node and data-nodes is an important part 
of version upgrade.


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