Adding asyncConsistentMultimap interface.

Change-Id: I3cd3632e29ff8c5eaf8328a7fdf77ead0b2d9093
diff --git a/core/api/src/main/java/org/onosproject/store/service/DistributedPrimitive.java b/core/api/src/main/java/org/onosproject/store/service/DistributedPrimitive.java
index e28cd20..e8111d6 100644
--- a/core/api/src/main/java/org/onosproject/store/service/DistributedPrimitive.java
+++ b/core/api/src/main/java/org/onosproject/store/service/DistributedPrimitive.java
@@ -39,6 +39,11 @@
         EVENTUALLY_CONSISTENT_MAP,
 
         /**
+         * Consistent Multimap.
+         */
+        CONSISTENT_MULTIMAP,
+
+        /**
          * distributed set.
          */
         SET,