Creating new creators for multimap primitive and a name based getter for treemap primitive.

Change-Id: I981b3f1f8ee01fbdd0677c3eedc3d5024b8bcf1e
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 29dd72d..c44d3c7 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
@@ -65,11 +65,23 @@
     }
 
     @Override
+    public <K, V> AsyncConsistentMultimap<K, V> getAsyncSetMultimap(
+            String name, Serializer serializer) {
+        return null;
+    }
+
+    @Override
     public <T> Topic<T> getTopic(String name, Serializer serializer) {
         return null;
     }
 
     @Override
+    public <V> AsyncConsistentTreeMap<V> getAsyncTreeMap(
+            String name, Serializer serializer) {
+        return null;
+    }
+
+    @Override
     public <V> ConsistentTreeMapBuilder<V> consistentTreeMapBuilder() {
         return null;
     }
@@ -78,4 +90,8 @@
     public <V> AsyncDocumentTree<V> getDocumentTree(String name, Serializer serializer) {
         return null;
     }
+    @Override
+    public <K, V> ConsistentMultimapBuilder<K, V> consistentMultimapBuilder() {
+        return null;
+    }
 }