Update tests

Author: dsplaisted

src/Tests/dotnet-MsiInstallation.Tests/MsiInstallerTests.cs

@@ -137,6 +137,7 @@ public void SdkInstallation()
             }
             else
             {
+                //  TODO: This doesn't work if we've installed additional runtimes to support the SDK
                 VM.GetRemoteDirectory($@"c:\Program Files\dotnet")
                     .Should()
                     .NotExist();

src/Tests/dotnet-MsiInstallation.Tests/WorkloadSetTests.cs

@@ -189,8 +189,7 @@ public void UpdateWorkloadSetWithoutAvailableManifests()
             VM.CreateRunCommand("dotnet", "workload", "update", "--source", @"c:\SdkTesting\workloadsets")
                 .Execute()
                 .Should()
-                .Pass()
-                .And.HaveStdOutContaining("No workload update found");
+                .Fail();
 
             VM.CreateRunCommand("dotnet", "workload", "search")
                 .WithIsReadOnly(true)