Add Javadoc for IndexedLambda

Change-Id: I28c822ce196ede8681dbca78f4e9cc05e6fa2e17
diff --git a/core/api/src/test/java/org/onosproject/net/IndexedLambdaTest.java b/core/api/src/test/java/org/onosproject/net/IndexedLambdaTest.java
index b08d995..8cbe823 100644
--- a/core/api/src/test/java/org/onosproject/net/IndexedLambdaTest.java
+++ b/core/api/src/test/java/org/onosproject/net/IndexedLambdaTest.java
@@ -18,7 +18,13 @@
 import com.google.common.testing.EqualsTester;
 import org.junit.Test;
 
+/**
+ * Test for IndexedLambda.
+ */
 public class IndexedLambdaTest {
+    /**
+     * Tests equality of IndexedLambda instances.
+     */
     @Test
     public void testEquality() {
         new EqualsTester()