[SPARK-21731] Upgrade scalastyle to 0.9

• Type: Task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: Build
• Assignee: Marcelo Masiero Vanzin
• Reporter: Marcelo Masiero Vanzin
• Created: 14/Aug/17 23:19
• Updated: 15/Aug/17 20:59
• Resolved: 15/Aug/17 20:59

Description

No new features that I'm interested in, but it fixes an issue with the import order checker so that it provides more useful errors (https://github.com/scalastyle/scalastyle/pull/185).