Github user vanzin commented on the pull request:

    https://github.com/apache/spark/pull/5786#issuecomment-101353251
  
    I think this is more than just a cleanup. As Favio points out, if you build 
with just `mvn package`, the build is broken because of inconsistent versions. 
The minimum command line to get a working build today is `mvn 
-Dhadoop.version=1.0.4 package`.
    
    It may be that all official build scripts work around that problem 
inadvertently. But the current code is not correct.
    
    So we either need to fix things so that the default profile is *actually* 
hadoop-2.2, or revert the previous change so that the default profile is 
hadoop-1. But right now the default profile is in a weird unhappy state.


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