Compile DataPull using OpenJDK 11+ once Scala becomes compatible

[markovarghese]

Is your feature request related to a problem? Please describe.
Although Scala apps can run on JDK 11, per official docs it is recommended that Java 8 be used for compiling Scala code. Per the same documentation, this is expected to happen in June 2019.

Describe the solution you'd like
Upgrade Scala and dependencies to a version that uses OpenJDK 11+.

Describe alternatives you've considered
An alternative is to use Amazon Corretto JDK instead.

Additional context
N/A

[JoshRamynke]

FYI - I attempted this for another Spark application and I eventually gave up on using JDK 11 until we upgrade to Spark 3.0.

I got everything to work except for the Hive metastore integration. I finally dug into the Spark code and found a workaround that was added in the 3.0 release: apache/spark@c65f9b2#diff-842e3447fc453de26c706db1cac8f2c4R329. Here’s the related ticket: https://issues.apache.org/jira/browse/SPARK-26839 and PR: apache/spark#24057.