[SPARK-6546][Build] Using the wrong code that will make spark compile failed!!

wrong code : val tmpDir = Files.createTempDir()
not Files should Utils

Author: DoingDone9 <799203320@qq.com>

Closes #5198 from DoingDone9/FilesBug and squashes the following commits:

6e0140d [DoingDone9] Update InsertIntoHiveTableSuite.scala
e57d23f [DoingDone9] Update InsertIntoHiveTableSuite.scala
802261c [DoingDone9] Merge pull request #7 from apache/master
d00303b [DoingDone9] Merge pull request #6 from apache/master
98b134f [DoingDone9] Merge pull request #5 from apache/master
161cae3 [DoingDone9] Merge pull request #4 from apache/master
c87e8b6 [DoingDone9] Merge pull request #3 from apache/master
cb1852d [DoingDone9] Merge pull request #2 from apache/master
c3f046f [DoingDone9] Merge pull request #1 from apache/master

sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala

@@ -198,7 +198,7 @@ class InsertIntoHiveTableSuite extends QueryTest with BeforeAndAfter {
     val testDatawithNull = TestHive.sparkContext.parallelize(
       (1 to 10).map(i => ThreeCloumntable(i, i.toString,null))).toDF()
 
-    val tmpDir = Files.createTempDir()
+    val tmpDir = Utils.createTempDir()
     sql(s"CREATE TABLE table_with_partition(key int,value string) PARTITIONED by (ds string) location '${tmpDir.toURI.toString}' ")
     sql("INSERT OVERWRITE TABLE table_with_partition  partition (ds='1') SELECT key,value FROM testData")