Mediatr example (#325)

* Updates based on documentation

* Getting the build passing

* Getting app functioning

* A few cleanups to confirm it's working as expected

* Fixing functional tests

* Updating dockerfile for 3.0

* Functional Tests now run sequentially

* Updating to latest version of moq

* Adding migration for post 3.0 upgrades

* Removing commented out lines

* Moving address and catalogitemordered configuration in to classes that own them

* Installing MediatR nuget packages

* Configure MediatR in Startup

* Creating GetMyOrders MediatR query and handler

* Adding GetOrderDetails MediatR handler

* Refactoring out default values

* Added tests for GetOrderDetails mediator handler

* Defaulting values on Models for now

* Removing some spaces

* Splitting files

* Splitting out the GetOrderDetails files

* Adding test for GetMyOrders

* restructuing folders

* Using constant

src/Web/ViewModels/OrderViewModel.cs

@@ -6,15 +6,13 @@ namespace Microsoft.eShopWeb.Web.ViewModels
 {
     public class OrderViewModel
     {
+        private const string DEFAULT_STATUS = "Pending";
+
         public int OrderNumber { get; set; }
         public DateTimeOffset OrderDate { get; set; }
         public decimal Total { get; set; }
-        public string Status { get; set; }
-
-        public Address ShippingAddress { get; set; } 
-
+        public string Status => DEFAULT_STATUS;
+        public Address ShippingAddress { get; set; }
         public List<OrderItemViewModel> OrderItems { get; set; } = new List<OrderItemViewModel>();
-
     }
-
 }