HDFS-15603. RBF: Fix getLocationsForPath twice in create operation. Contributed by wangzhaohui.

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java

@@ -288,7 +288,7 @@ public class RouterClientProtocol implements ClientProtocol {
         rpcServer.getLocationsForPath(src, true);
     RemoteLocation createLocation = null;
     try {
-      createLocation = rpcServer.getCreateLocation(src);
+      createLocation = rpcServer.getCreateLocation(src, locations);
       return rpcClient.invokeSingle(createLocation, method,
           HdfsFileStatus.class);
     } catch (IOException ioe) {