v1 of adding Scala Support

[riserrad]

Adds:

• Tasks

  • Start Cluster
  • Install Scala Tools
  • Install Spark
  • Compile and Install JAR on Cluster

• Fixes

  • Feedback about telling the user he/she needs to Use Python 3.x before running Configure Databricks CLI

• Also adds dependency on shelljs to replace the native tl.tool from the azdo task library. Reason: cleaner and allows debugging from a local environment.