MAPREDUCE-5053. java.lang.InternalError from decompression codec cause reducer to fail (Robert Parker via jeagles)

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Reverting MAPREDUCE-5028 (commit 1457919)

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svn merge -c 1458466 FIXES: YARN-200. yarn log does not output all needed information, and is in a binary format. Contributed by Ravi Prakash


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