Fix hive-thriftserver tests that don't expect an existing dir

Author: srowen

sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala

@@ -39,7 +39,9 @@ class CliSuite extends FunSuite with BeforeAndAfterAll with Logging {
 
     val (queries, expectedAnswers) = queriesAndExpectedAnswers.unzip
     val warehousePath = Utils.createTempDir()
+    warehousePath.delete()
     val metastorePath = Utils.createTempDir()
+    metastorePath.delete()
     val cliScript = "../../bin/spark-sql".split("/").mkString(File.separator)
 
     val command = {

sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala

@@ -300,7 +300,9 @@ abstract class HiveThriftServer2Test extends FunSuite with BeforeAndAfterAll wit
 
   private def startThriftServer(port: Int, attempt: Int) = {
     warehousePath = Utils.createTempDir()
+    warehousePath.delete()
     metastorePath = Utils.createTempDir()
+    metastorePath.delete()
     logPath = null
     logTailingProcess = null