Jeff Zhang

It is to fine to compile with spark 2.2, the main change is on SparkScala211Interpreter.scala which is due to scala repl api changes in scala 2.11.12.

This is for the next release of zeppelin which I suppose should supported the latest spark 2.4.0 which would use scala 2.11.12. Just want to catch up with spark.

Anyway, this PR is just for the next release of spark that supports scala 2.11.12, I can hold it if you have any concern

Thanks @HyukjinKwon feel free to take over this

Thanks @hyonaldo , have you thought about provide api for this and list the cron jobs in frontend ?

Thanks @amakaur for the contribution, is it possible to add unit test for this ?

ping @amakaur

@rickchengx Could you rebase this PR ?

Thanks @rickchengx

\cc @prabhjyotsingh