[Falcon][ONOS-2696] support method "replace" in ConsistentMap and method "notNull" in Match

Change-Id: I7c7d4644f963e52297785c2f9a5f21eff8723e61
diff --git a/core/api/src/test/java/org/onosproject/store/service/ConsistentMapAdapter.java b/core/api/src/test/java/org/onosproject/store/service/ConsistentMapAdapter.java
index d0c1adf..a7a6ce8 100644
--- a/core/api/src/test/java/org/onosproject/store/service/ConsistentMapAdapter.java
+++ b/core/api/src/test/java/org/onosproject/store/service/ConsistentMapAdapter.java
@@ -123,6 +123,11 @@
     }
 
     @Override
+    public Versioned<V> replace(K key, V value) {
+        return null;
+    }
+
+    @Override
     public boolean replace(K key, V oldValue, V newValue) {
         return false;
     }