fix rolling upgrade unit test.

Author: hfutatzhanghb

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRollingUpgrade.java

@@ -169,7 +169,7 @@ private static Configuration setConf(Configuration conf, File dir,
     return conf;
   }
 
-  @Test (timeout = 30000)
+  @Test (timeout = 300000)
   public void testRollingUpgradeWithQJM() throws Exception {
     String nnDirPrefix = MiniDFSCluster.getBaseDirectory() + "/nn/";
     final File nn1Dir = new File(nnDirPrefix + "image1");
@@ -601,7 +601,7 @@ public void testCheckpointWithMultipleNN() throws IOException, InterruptedExcept
     testCheckpoint(3);
   }
 
-  @Test(timeout = 60000)
+  @Test(timeout = 300000)
   public void testRollBackImage() throws Exception {
     final Configuration conf = new HdfsConfiguration();
     conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_TXNS_KEY, 10);