[SPARK-21240] Fix code style for constructing and stopping a SparkContext in UT

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Fix Version/s: 2.3.0
• Component/s: Spark Core
• Assignee: Jin Xing
• Reporter: Jin Xing
• Created: 28/Jun/17 11:26
• Updated: 29/Jun/17 09:00
• Resolved: 29/Jun/17 08:59

Description

Related to SPARK-20985.
Fix code style for constructing and stopping a SparkContext. Assure the context is stopped to avoid other tests complain that there's only one SparkContext can exist.

Issue Links

• links to: [Github] Pull Request #18454 (jinxing64)