Fixing tests and removing NuGet warnings

samples/IdentitySample.Mvc/project.json

@@ -26,8 +26,7 @@
     "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*",
     "Microsoft.Extensions.Logging.Console": "1.0.0-*",
     "Microsoft.Extensions.Logging.Debug": "1.0.0-*",
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
-    "System.IO": "4.1.0-*"
+    "Microsoft.NETCore.Platforms": "1.0.1-*"
   },
   "compilationOptions": {
     "emitEntryPoint": true

test/Microsoft.AspNetCore.Identity.EntityFrameworkCore.Test/Utilities/TestEnvironment.cs

@@ -1,6 +1,7 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
+using System.IO;
 using Microsoft.Extensions.Configuration;
 
 namespace Microsoft.AspNetCore.Identity.EntityFrameworkCore.Test.Utilities
@@ -12,7 +13,7 @@ namespace Microsoft.AspNetCore.Identity.EntityFrameworkCore.Test.Utilities
         static TestEnvironment()
         {
             var configBuilder = new ConfigurationBuilder()
-                .SetBasePath(".")
+                .SetBasePath(Directory.GetCurrentDirectory())
                 .AddJsonFile("config.json", optional: true)
                 .AddJsonFile("config.test.json", optional: true)
                 .AddEnvironmentVariables();

test/Microsoft.AspNetCore.Identity.Test/project.json

@@ -17,10 +17,8 @@
     "netstandardapp1.5": {
       "dependencies": {
         "moq.netcore": "4.4.0-beta8",
-        "System.Xml.ReaderWriter": "4.0.10-*",
         "dotnet-test-xunit": "1.0.0-dev-*",
-        "NETStandard.Library": "1.5.0-*",
-        "System.Diagnostics.Process": "4.1.0-*"
+        "NETStandard.Library": "1.5.0-*"
       },
       "imports": [
         "dnxcore50",