added controller stub. before changing idataaccess to abstract class

COA.EnterpriseServices.DataAccess/Helpers/CreditorHelper.cs

@@ -41,5 +41,10 @@ namespace COA.EnterpriseServices.DataAccess.Helpers
         {
             return creditorDataAccess.Invoke(d => d.Add(creditor));
         }
+
+        public bool SetCreditorStatus(int creditorId, string status)
+        {
+            return creditorDataAccess.Invoke(d => d.Update(creditorId, c => c.Status = status));
+        }
     }
 }

COA.EnterpriseServices.DataAccess/IDataAccess.cs

@@ -10,6 +10,8 @@ namespace COA.EnterpriseServices.DataAccess
 
         bool Update(T item);
 
+        bool Update(int id, Action<T> update);
+
         ICollection<T> Get(Expression<Func<T, bool>> query);
     }
 }