Fixed naming and visibility of storage dictionary in dynamic data tests

Author: dr-BEat

test/WorkflowCore.IntegrationTests/Scenarios/DynamicDataIOScenario.cs

@@ -28,12 +28,12 @@ public class MyDataClass
             public int Value1 { get; set; }
             public int Value2 { get; set; }
 
-            public Dictionary<string, int> _storage = new Dictionary<string, int>();
+            public Dictionary<string, int> Storage = new Dictionary<string, int>();
 
             public int this[string propertyName]
             {
-                get => _storage[propertyName];
-                set => _storage[propertyName] = value;
+                get => Storage[propertyName];
+                set => Storage[propertyName] = value;
             }
         }