Switch to NuGet v3 package sources

nuget.config

@@ -10,9 +10,8 @@
   <packageSources>
     <clear/>
     <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
-    <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
     <add key="myget.org/F/aarnott" value="https://www.myget.org/F/aarnott/api/v2" />
-    <add key="VSIDEProj (cpvsbuild)" value="\\cpvsbuild\drops\vsideproj\Packages" />
+    <add key="VSIDEProj (cpvsbuild)" value="\\cpvsbuild\drops\vsideproj\Packages\v3" />
     <add key="VSPackages" value="\\cpvsbuild\drops\dd\NuGet" />
   </packageSources>
   <disabledPackageSources>

src/Microsoft.VisualStudio.Validation.sln

@@ -26,6 +26,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		..\EnlistmentInfo.props = ..\EnlistmentInfo.props
 		..\EnlistmentInfo.targets = ..\EnlistmentInfo.targets
+		..\nuget.config = ..\nuget.config
 		..\version.json = ..\version.json
 	EndProjectSection
 EndProject