Made default Kryo serialization buffer smaller
Made default Kryo serialization buffer smaller

sameeragarwal/blinkdb,mapr/shark,mapr/shark,sameeragarwal/blinkdb_dev,amplab/shark,sjyk/sampleclean,sameeragarwal/blinkdb,sjyk/sampleclean,vax11780/shark,sjyk/sampleclean,lzshlzsh/shark,sameeragarwal/blinkdb_dev,mapr/shark,sameeragarwal/blinkdb,amplab/shark,alabid/blinkdb,mattyb149/blinkdb,lzshlzsh/shark,vax11780/shark,amplab/shark,sameeragarwal/blinkdb_dev,mattyb149/blinkdb,lzshlzsh/shark,alabid/blinkdb,alabid/blinkdb,mattyb149/blinkdb,vax11780/shark