Wait 2min before shutting down local dynamodb to verify it works by e…

…xecuting ` aws dynamodb list-tables --endpoint-url http://localhost:8000`

examples/simple.js

@@ -13,7 +13,11 @@ DynamoDbLocal.launch(8000)
         console.log('PID created: ', ChildProcess.pid);
 
         //do your tests
-
-        DynamoDbLocal.stop(8000);
-        console.log('finished');
+        // sleep 2 minutes
+        setTimeout(function () {
+            console.log('stopping');
+            DynamoDbLocal.stop(8000);
+            console.log('finished');
+        }, 120000);
+
     });