MAPREDUCE-6698. Increase timeout on TestUnnecessaryBlockingOnHistoryFileInfo.testTwoThreadsQueryingDifferentJobOfSameUser. Contributed by Haibo Chen

(cherry picked from commit 34fddd1e912dcd9f898e500b8df11295ee49c0d8)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestUnnecessaryBlockingOnHistoryFileInfo.java

@@ -83,7 +83,7 @@ public class TestUnnecessaryBlockingOnHistoryFileInfo {
    * blocked by the other while the other thread is holding the lock on its
    * associated job files and hanging up parsing the files.
    */
-  @Test(timeout = 20000)
+  @Test(timeout = 600000)
   public void testTwoThreadsQueryingDifferentJobOfSameUser()
       throws InterruptedException, IOException {
     final Configuration config = new Configuration();