Fix AtomicCounter addAndGet

Change-Id: I51e87a327b19956d76f9916a376414b5eea38929
diff --git a/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounter.java b/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounter.java
index 3697074..5dae05c 100644
--- a/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounter.java
+++ b/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounter.java
@@ -56,7 +56,7 @@
 
     @Override
     public long addAndGet(long delta) {
-        return complete(asyncCounter.getAndAdd(delta));
+        return complete(asyncCounter.addAndGet(delta));
     }
 
     @Override