Spark interpreter binary compatibility to scala 2.10 / 2.11 broken

Scala 2.11 support in SparkInterpreter designed to provide binary compatibility to scala 2.10 and scala 2.11.

i.e. changing SPARK_HOME should be enough to make Zeppelin work with any version of spark without rebuild. Spark 2.0.0 (with scala 2.11), Spark 1.6.2 (with scala 2.10), and so on.

The reason is spark interpreter has zeppelin-display as a dependency. and zeppelin-display brings particular version of scala library.

Solution could be exclude zeppelin-display from spark interpreter's dependency, and let user load zeppelin-display from maven repository dynamically by using dependency loader, when it's needed.