Added feature to count exceptions ocurred when operating distributed primitives

Change-Id: I24017e61cd2aefd1cf78aa5b241a3219e3e89b32
diff --git a/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java
index 4c842f7..e8c93f3 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java
@@ -72,7 +72,7 @@
                 return valueMap.replace(name, serializer.encode(expect), serializer.encode(update));
             }
         } finally {
-            newTimer.stop();
+            newTimer.stop(null);
         }
     }
 
@@ -83,7 +83,7 @@
             Versioned<byte[]> rawValue = valueMap.get(name);
             return rawValue == null ? null : serializer.decode(rawValue.value());
         } finally {
-            newTimer.stop();
+            newTimer.stop(null);
         }
     }
 
@@ -95,7 +95,7 @@
                     valueMap.remove(name) : valueMap.put(name, serializer.encode(value));
             return previousValue == null ? null : serializer.decode(previousValue.value());
         } finally {
-            newTimer.stop();
+            newTimer.stop(null);
         }
     }