Some improvements around EventuallyConsistentMapBuilder serializer handling.

- Allow directly passing KryoNamespace
- Add some registration id gap before ECMap's internal registration
- Some improvements for ease of registration issue investigation
-- Add friendly name to ECMap's internal KryoNamespace
-- Add backtrace information

Change-Id: I7c87b3aefbaea4b2ed12b38c3e0813e9d195c7a9
diff --git a/core/api/src/test/java/org/onosproject/store/service/TestEventuallyConsistentMap.java b/core/api/src/test/java/org/onosproject/store/service/TestEventuallyConsistentMap.java
index b87517a..008ae69 100644
--- a/core/api/src/test/java/org/onosproject/store/service/TestEventuallyConsistentMap.java
+++ b/core/api/src/test/java/org/onosproject/store/service/TestEventuallyConsistentMap.java
@@ -179,6 +179,11 @@
         }
 
         @Override
+        public EventuallyConsistentMapBuilder<K, V> withSerializer(KryoNamespace serializer) {
+            return this;
+        }
+
+        @Override
         public EventuallyConsistentMapBuilder<K, V>
         withTimestampProvider(BiFunction<K, V, Timestamp> timestampProvider) {
             return this;