sbt: update scala to 2.11.11
sbt: update scala to 2.11.11

holdenk/spark-testing-base,holdenk/spark-testing-base,holdenk/spark-testing-base,snithish/spark-testing-base,snithish/spark-testing-base,holdenk/spark-testing-base,snithish/spark-testing-base,snithish/spark-testing-base