Fix javac: [deprecation] warning

Author: virajjasani

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer2.java

@@ -31,6 +31,7 @@
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.NameNodeProxies;
+import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.hadoop.hdfs.protocol.ClientProtocol;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@@ -678,7 +679,7 @@ public void testMaxIterationTime() throws Exception {
         4 * 1024 * 1024);
     // set client socket timeout to have an IN_PROGRESS notification back from
     // the DataNode about the copy in every second.
-    conf.setLong(DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY, 2000L);
+    conf.setLong(HdfsClientConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY, 2000L);
     // set max iteration time to 500 ms to timeout before moving any block
     conf.setLong(DFSConfigKeys.DFS_BALANCER_MAX_ITERATION_TIME_KEY, 500L);
     // setup the cluster