Update appveyor.yml

Fix test results not being included in artifacts.
Name the artifact sets.
Remove failed attempt to collect test results.

appveyor.yml

@@ -1,14 +1,13 @@
 version: 2.1.1.{build}
 
-environment:
-  TestCaptureOutput: false
-
 build_script:
   - eng\common\CIBuild.cmd -configuration Release -prepareMachine
 
 artifacts:
   - path: artifacts\packages\Release\Shipping\*.nupkg
-  - path: artifacts\TestResults\*
+    name: Packages
+  - path: artifacts\TestResults\**\*
+    name: 'Test Results'
 
 nuget:
   disable_publish_on_pr: true