[LIVY-477] Upgrade Livy Scala version to 2.11.12

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.5.0
• Fix Version/s: 0.6.0
• Component/s: Build
• Assignee: Saisai Shao
• Reporter: Saisai Shao
• Created: 11/Jun/18 05:49
• Updated: 12/Jun/18 12:54
• Resolved: 12/Jun/18 12:54

Description

Scala version below 2.11.12 has CVE (https://scala-lang.org/news/security-update-nov17.html), and Spark will also upgrade its supported version to 2.11.12. 

So here upgrading Livy's Scala version also.