The latest xUnit packages fix the "could not resolve coreclr path"
problem we were having. To resolve all dependencies, the cli-deps feed
was replaced with the aspnet feeds.
However, the latest xUnit packages do not allow us to set the default
AssemblyLoadContext.
Although there is a dedicated `coreclr-xunit` feed for this package, it
is missing some needed dependencies. Rather than add yet another feed
(`aspnetvnext`), we'll use the `cli-deps` feed as it has all the
packages that `dotnet-test-xunit` needs, and is likely to stick around.
Add almost all files to Microsoft.PowerShell.Commands.Management
One of them is Computer.cs that was listed in known issues.
We start to use a nuget packages generated for assemlbies that
cannot be listed in framework assemlbies, but exist in a GAC
on all windows machine and not a PowerShell assemblies
The first one is Microsoft.WSMan.Management
Commands.Utility now needs Microsoft.CodeAnalysis.CSharp, which doesn't
explicitly target `dnxcore50`, so now Commands.Utility and the packages
which depend on it now much `import` the Portable Windows framework.
This also required adding the aspnetvnext feed.
System.Management.Automation now requires System.Diagnostics.StackTrace.
