Standardize namespaces to all be under the Microsoft.eShopOnWeb namespace and update default namespaces. (#102)

src/WebRazorPages/Program.cs

@@ -2,8 +2,8 @@
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Logging;
-using Infrastructure.Data;
-using Infrastructure.Identity;
+using Microsoft.eShopWeb.Infrastructure.Data;
+using Microsoft.eShopWeb.Infrastructure.Identity;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.AspNetCore.Identity;