fix bugs: remove Spark test suite that can create another sparkContext
fix bugs: remove Spark test suite that can create another sparkContext

hsaputra/DDF,milliondreams/ddf-with-flink,ddf-project/DDF,milliondreams/ddf-with-flink,ddf-project/DDF,ddf-project/ddf-flink,hsaputra/DDF,phvu/DDF,ddf-project/ddf-flink,phvu/DDF,ubolonton/DDF,ubolonton/DDF,hsaputra/DDF,hsaputra/DDF,ubolonton/DDF,hsaputra/DDF,phvu/DDF,ddf-project/DDF,phvu/DDF,ddf-project/DDF,phvu/DDF,ddf-project/DDF,ubolonton/DDF,ubolonton/DDF