Fixed NoClassDefFoundError exception related to Apache Hadoop DistCp tool.
    - Hadoop 1 and Hadoop 2 have different implementation of DistCp with different constructors.
    - The fix uses reflection to make DistCp in the sample code to work with both Hadoop 1 and Hadoop 2.
Merge pull request #1 from jcai4me/master

  Fixed NoClassDefFoundError exception related to Apache Hadoop DistCp tool