add serialVersionUID for TestWordTopology (#718)
diff --git a/heron/storm/src/java/backtype/storm/testing/TestWordSpout.java b/heron/storm/src/java/backtype/storm/testing/TestWordSpout.java
index b38f663..bdb1d21 100644
--- a/heron/storm/src/java/backtype/storm/testing/TestWordSpout.java
+++ b/heron/storm/src/java/backtype/storm/testing/TestWordSpout.java
@@ -26,6 +26,7 @@
 
 public class TestWordSpout extends BaseRichSpout {
 
+  private static final long serialVersionUID = -6923231632469169744L;
   private SpoutOutputCollector collector;
   private String[] words;
   private Random rand;
diff --git a/heron/storm/src/java/org/apache/storm/testing/TestWordSpout.java b/heron/storm/src/java/org/apache/storm/testing/TestWordSpout.java
index e0161ad..759f267 100644
--- a/heron/storm/src/java/org/apache/storm/testing/TestWordSpout.java
+++ b/heron/storm/src/java/org/apache/storm/testing/TestWordSpout.java
@@ -25,6 +25,7 @@
 
 public class TestWordSpout extends BaseRichSpout {
 
+  private static final long serialVersionUID = -2593434164020114705L;
   private SpoutOutputCollector collector;
   private String[] words;
   private Random rand;