[ONOS-6497] Add globally unique numeric ID generator primitive

Change-Id: Ic2d9214cfa885344694b8ba4250054dd6a33144e
diff --git a/core/api/src/test/java/org/onosproject/store/service/StorageServiceAdapter.java b/core/api/src/test/java/org/onosproject/store/service/StorageServiceAdapter.java
index b68958f..92aeddc 100644
--- a/core/api/src/test/java/org/onosproject/store/service/StorageServiceAdapter.java
+++ b/core/api/src/test/java/org/onosproject/store/service/StorageServiceAdapter.java
@@ -45,6 +45,11 @@
     }
 
     @Override
+    public AtomicIdGeneratorBuilder atomicIdGeneratorBuilder() {
+        return null;
+    }
+
+    @Override
     public <V> AtomicValueBuilder<V> atomicValueBuilder() {
         return null;
     }