Adding additional resources for instantiating async consistent treemaps.

Change-Id: I7bfc602ac22eda1844fea2a7b3e3133f83157bf3
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
index 7658793..25eb3a5 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
@@ -47,6 +47,7 @@
 import org.onosproject.store.service.AtomicValueBuilder;
 import org.onosproject.store.service.ConsistentMap;
 import org.onosproject.store.service.ConsistentMapBuilder;
+import org.onosproject.store.service.ConsistentTreeMapBuilder;
 import org.onosproject.store.service.DistributedSetBuilder;
 import org.onosproject.store.service.EventuallyConsistentMapBuilder;
 import org.onosproject.store.service.LeaderElectorBuilder;
@@ -131,6 +132,12 @@
     }
 
     @Override
+    public <V> ConsistentTreeMapBuilder<V> consistentTreeMapBuilder() {
+        return new DefaultConsistentTreeMapBuilder<V>(
+                federatedPrimitiveCreator);
+    }
+
+    @Override
     public <E> DistributedSetBuilder<E> setBuilder() {
         checkPermission(STORAGE_WRITE);
         return new DefaultDistributedSetBuilder<>(() -> this.<E, Boolean>consistentMapBuilder());