Figure out the minimum set of required jars for Hive on Spark after bumping up to Spark 2.0.0

Considering that there's no assembly jar for Spark since 2.0.0, we should figure out the minimum set of required jars for HoS to work after bumping up to Spark 2.0.0. By this way, users can decide whether they want to add just the required jars, or all the jars under spark's dir for convenience.