Calling UseRouting before UseMvcWithDefaultRouteAndArea.

Resolve #2028

samples/MicroserviceDemo/gateways/BackendAdminAppGateway.Host/BackendAdminAppGatewayHostModule.cs

@@ -103,7 +103,11 @@ namespace BackendAdminAppGateway.Host
             app.MapWhen(
                 ctx => ctx.Request.Path.ToString().StartsWith("/api/abp/") ||
                        ctx.Request.Path.ToString().StartsWith("/Abp/"),
-                app2 => { app2.UseMvcWithDefaultRouteAndArea(); }
+                app2 =>
+                {
+                    app2.UseRouting();
+                    app2.UseMvcWithDefaultRouteAndArea();
+                }
             );
 
             app.UseOcelot().Wait();

samples/MicroserviceDemo/gateways/InternalGateway.Host/InternalGatewayHostModule.cs

@@ -94,7 +94,11 @@ namespace InternalGateway.Host
                     ctx.Request.Path.ToString().StartsWith("/api/abp/") ||
                     ctx.Request.Path.ToString().StartsWith("/Abp/") ||
                     ctx.Request.Path.ToString().StartsWith("/Test/"),
-                app2 => { app2.UseMvcWithDefaultRouteAndArea(); }
+                app2 =>
+                {
+                    app2.UseRouting();
+                    app2.UseMvcWithDefaultRouteAndArea();
+                }
             );
 
             app.UseOcelot().Wait();

samples/MicroserviceDemo/gateways/PublicWebSiteGateway.Host/PublicWebSiteGatewayHostModule.cs

@@ -90,7 +90,11 @@ namespace PublicWebSiteGateway.Host
             app.MapWhen(
                 ctx => ctx.Request.Path.ToString().StartsWith("/api/abp/") ||
                        ctx.Request.Path.ToString().StartsWith("/Abp/"),
-                app2 => { app2.UseMvcWithDefaultRouteAndArea(); }
+                app2 =>
+                {
+                    app2.UseRouting();
+                    app2.UseMvcWithDefaultRouteAndArea();
+                }
             );
 
             app.UseOcelot().Wait();