Added meter in DefaultTrafficTreatment toString() method.

Change-Id: I7dabe40897fa1aba3e38cd430a0c89d6e2e6bd32
diff --git a/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficTreatment.java b/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficTreatment.java
index 3934722..d45d8a9 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficTreatment.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficTreatment.java
@@ -188,6 +188,7 @@
                 .add("immediate", immediate)
                 .add("deferred", deferred)
                 .add("transition", table == null ? "None" : table.toString())
+                .add("meter", meter == null ? "None" : meter.toString())
                 .add("cleared", hasClear)
                 .add("metadata", meta)
                 .toString();