Enable flaky tests.

Author: hvanhovell

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

@@ -488,8 +488,7 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
     }
   }
 
-  // TODO: enable this
-  ignore("SPARK-11595 ADD JAR with input path having URL scheme") {
+  test("SPARK-11595 ADD JAR with input path having URL scheme") {
     withJdbcStatement { statement =>
       val jarPath = "../hive/src/test/resources/TestUDTF.jar"
       val jarURL = s"file://${System.getProperty("user.dir")}/$jarPath"
@@ -547,8 +546,7 @@ class SingleSessionSuite extends HiveThriftJdbcTest {
   override protected def extraConf: Seq[String] =
     "--conf spark.sql.hive.thriftServer.singleSession=true" :: Nil
 
-  // TODO: enable this
-  ignore("test single session") {
+  test("test single session") {
     withMultipleConnectionJdbcStatement(
       { statement =>
         val jarPath = "../hive/src/test/resources/TestUDTF.jar"