Remove unnecessary object creation when calculating hashCode()

Change-Id: Idbfec9d076a294fc6123ac209f6d1a955baf407e
diff --git a/core/api/src/main/java/org/onosproject/net/resource/Lambda.java b/core/api/src/main/java/org/onosproject/net/resource/Lambda.java
index be03254..3555b12 100644
--- a/core/api/src/main/java/org/onosproject/net/resource/Lambda.java
+++ b/core/api/src/main/java/org/onosproject/net/resource/Lambda.java
@@ -68,7 +68,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hashCode(this.lambda);
+        return lambda;
     }
 
     @Override