Add version to servers' startup massage.
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                 Key: HADOOP-2586
                 URL: https://issues.apache.org/jira/browse/HADOOP-2586
             Project: Hadoop
          Issue Type: Improvement
    Affects Versions: 0.15.0
            Reporter: Konstantin Shvachko


It would be useful if hadoop servers printed hadoop version as a part of the 
startup message:
{code}
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = my-hadoop-host
STARTUP_MSG:   args = [-upgrade]
STARTUP_MSG: Version = 0.15.1, r599161
************************************************************/
{code}

This would simplify understanding the logs.

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