Word count example doesn't output the words correctly to cassandra.  It outputs 
spurious data past the length of the byte array.
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                 Key: CASSANDRA-1993
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1993
             Project: Cassandra
          Issue Type: Bug
          Components: Hadoop
    Affects Versions: 0.7.0
         Environment: All
            Reporter: Jesse Shieh
            Priority: Minor


To reproduce:
# start a local cassandra server e.g. sudo bin/cassandra -f
cd contrib/word_count
ant
bin/word_count_setup
bin/word_count

# check the data in cassandra, all looks fine because the words are all of the 
same length.
# change the data in cassandra to real words, rerun the mapreduce and you'll 
see some words have spurious characters written past their length
# this is because the word bytes are not terminated at their length

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