Minor changes addressing Pavlin's concerns
diff --git a/src/main/java/net/onrc/onos/ofcontroller/util/CallerId.java b/src/main/java/net/onrc/onos/ofcontroller/util/CallerId.java
index ec18f09..a0217d4 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/util/CallerId.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/util/CallerId.java
@@ -18,6 +18,7 @@
      * @param otherCallerId
      */
     public CallerId(CallerId otherCallerId) {
+    // Note: make a full copy if we change value to a mutable type
     value = otherCallerId.value;
     }