Fixed the broken Java unit test from SPARK-635.

core/src/test/scala/spark/JavaAPISuite.java

 package spark;
 
+import java.io.File;
+import java.io.IOException;
+import java.io.Serializable;
+import java.util.*;
+
+import scala.Tuple2;
+
 import com.google.common.base.Charsets;
 import com.google.common.io.Files;
 import org.apache.hadoop.io.IntWritable;
@@ -12,8 +19,6 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
-import scala.Tuple2;
-
 import spark.api.java.JavaDoubleRDD;
 import spark.api.java.JavaPairRDD;
 import spark.api.java.JavaRDD;
@@ -24,10 +29,6 @@ import spark.partial.PartialResult;
 import spark.storage.StorageLevel;
 import spark.util.StatCounter;
 
-import java.io.File;
-import java.io.IOException;
-import java.io.Serializable;
-import java.util.*;
 
 // The test suite itself is Serializable so that anonymous Function implementations can be
 // serialized, as an alternative to converting these anonymous classes to static inner classes;
@@ -383,7 +384,8 @@ public class JavaAPISuite implements Serializable {
   @Test
   public void iterator() {
     JavaRDD<Integer> rdd = sc.parallelize(Arrays.asList(1, 2, 3, 4, 5), 2);
-    Assert.assertEquals(1, rdd.iterator(rdd.splits().get(0)).next().intValue());
+    TaskContext context = new TaskContext(0, 0, 0);
+    Assert.assertEquals(1, rdd.iterator(rdd.splits().get(0), context).next().intValue());
   }
 
   @Test