Fixing test failure because the web app is using packages in a feed that we did not have. Add that feed through a NuGet.COnfig only for the tests that need it.

test/dotnet-migrate.Tests/GivenThatIWantToMigrateTestApps.cs

@@ -121,6 +121,7 @@ namespace Microsoft.DotNet.Migration.Tests
         private MigratedBuildComparisonData GetDotnetNewComparisonData(string projectDirectory, string dotnetNewType)
         {
             DotnetNew(projectDirectory, dotnetNewType);
+            File.Copy("NuGet.tempaspnetpatch.config", Path.Combine(projectDirectory, "NuGet.Config"));
             Restore(projectDirectory);
 
             var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory);

test/dotnet-migrate.Tests/NuGet.tempaspnetpatch.config

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <!--To inherit the global NuGet package sources remove the <clear/> line below -->
+    <clear />
+    <add key="dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
+    <add key="cli-deps" value="https://dotnet.myget.org/F/cli-deps/api/v3/index.json" />
+    <add key="aspnet101" value="https://www.myget.org/F/aspnet101/api/v3/index.json" />
+    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
+  </packageSources>
+</configuration>

test/dotnet-migrate.Tests/project.json

@@ -1,7 +1,7 @@
 {
   "version": "1.0.0-*",
   "buildOptions": {
-    "copyToOutput": ["MSBuild.exe", "MSBuild.exe.config"]
+    "copyToOutput": ["MSBuild.exe", "MSBuild.exe.config", "NuGet.tempaspnetpatch.config"]
   },
   "dependencies": {
     "Microsoft.NETCore.App": {