SPARK-12868: Addressing comments.

Author: Parth-Brahmbhatt

sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala

@@ -88,7 +88,7 @@ private[hive] class HiveClientImpl(
   private val outputBuffer = new CircularBuffer()
 
   // An object lock to ensure URL factory is registered exactly once.
-  object URLFactoryRegistrationLock{}
+  object URLFactoryRegistrationLock
 
   private val shim = version match {
     case hive.v12 => new Shim_v0_12()

sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala

@@ -863,7 +863,8 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
     val e = intercept[RuntimeException] {
       sql(s"ADD JAR $testJar")
     }
-    assert(e.getMessage.contains("java.net.UnknownHostException: nn1"))
+    e.printStackTrace()
+    assert(e.getMessage.contains("java.net.UnknownHostException: nn"))
   }
 
   test("ADD JAR command 2") {