Include Microsoft.AspNetCore.Diagnostics in MusicStore

src/MusicStore/project.json

@@ -34,6 +34,7 @@
     "Microsoft.AspNetCore.Authentication.MicrosoftAccount": "1.0.0-*",
     "Microsoft.AspNetCore.Authentication.OpenIdConnect": "0.1.0-*",
     "Microsoft.AspNetCore.Authentication.Twitter": "1.0.0-*",
+    "Microsoft.AspNetCore.Diagnostics": "1.0.0-*",
     "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-*",
     "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-*",
     "Microsoft.AspNetCore.IISPlatformHandler": "1.0.0-*",