Introducing ClasspathScanDescriptionProvider instead of hardcoded
components.

Updating MRUnit dependency to 1.0.0
Fixing serialization issues:
http://stackoverflow.com/questions/22532309/mrunit-with-hbase-and-mapreduce-gets-an-error-with-serialization

http://stackoverflow.com/questions/15476332/java-lang-nullpointerexception-using-mrunit-custom-key-serialization-error