Update to RTM build of ActiveDirectory package

Author: pranavkm

samples/OpenIdConnect.AzureAdSample/project.json

@@ -7,7 +7,7 @@
     "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0-*",
     "Microsoft.Extensions.Configuration.UserSecrets": "1.1.0-*",
     "Microsoft.Extensions.Logging.Console": "1.1.0-*",
-    "Microsoft.IdentityModel.Clients.ActiveDirectory": "3.11.305310302-alpha"
+    "Microsoft.IdentityModel.Clients.ActiveDirectory": "3.13.4"
   },
   "frameworks": {
     "net451": {},