[SPARK-19207][SQL] LocalSparkSession should use Slf4JLoggerFactory.INSTANCE

## What changes were proposed in this pull request?

Using Slf4JLoggerFactory.INSTANCE instead of creating Slf4JLoggerFactory's object with constructor. It's deprecated.

## How was this patch tested?

With running StateStoreRDDSuite.

Author: Tsuyoshi Ozawa <ozawa@apache.org>

Closes #16570 from oza/SPARK-19207.

sql/core/src/test/scala/org/apache/spark/sql/LocalSparkSession.scala

@@ -29,7 +29,7 @@ trait LocalSparkSession extends BeforeAndAfterEach with BeforeAndAfterAll { self
 
   override def beforeAll() {
     super.beforeAll()
-    InternalLoggerFactory.setDefaultFactory(new Slf4JLoggerFactory())
+    InternalLoggerFactory.setDefaultFactory(Slf4JLoggerFactory.INSTANCE)
   }
 
   override def afterEach() {