Using Livy with Spark
Livy supports Scala versions 2.10 and 2.11.
For default Scala builds, Spark 2.0 with Scala 2.11, Livy automatically detects the correct Scala version and associated jar files.
If you require a different Spark-Scala combination, such as Spark 2.0 with Scala 2.10,
livy.spark.scalaVersion to the desired version so that Livy uses
the right jar files.