Change image name for Windows Smoke tests (microsoft#6423)

* Change image name for Windows Smoke tests * Re-enable smoke tests

Author: DonJayamanne

build/ci/templates/uitest_jobs.yml

@@ -140,7 +140,7 @@ jobs:
  ${{ format('Win{2}{0}{1}', py.displayName, job.test, channel) }}:
  PythonVersion: ${{ py.version }}
  VSCodeChannel: ${{ channel }}
- VMImageName: "windows-latest"
+ VMImageName: "vs2017-win2016"
  Tags: ${{ format('{0} {1} --tags=~@mac --tags=~@linux', job.tags, py.excludeTags) }}
 
  ${{ if not(contains(coalesce(job.ignoreOperatingSystems, ''), 'linux')) }}:

build/ci/vscode-python-pr-validation.yaml

@@ -25,15 +25,15 @@ variables:
 jobs:
 - template: templates/build_compile_jobs.yml
 
-# - template: templates/uitest_jobs.yml
-#  parameters:
-#  # In PRs, test only against stable version of VSC.
-#  vscodeChannels: ['stable']
-#  # In PRs, run smoke tests against 3.7 and 2.7 (excluding others).
-#  jobs:
-#  - test: "Smoke"
-#  tags: "--tags=@smoke"
-#  ignorePythonVersions: "3.6,3.5"
+- template: templates/uitest_jobs.yml
+ parameters:
+ # In PRs, test only against stable version of VSC.
+ vscodeChannels: ['stable']
+ # In PRs, run smoke tests against 3.7 and 2.7 (excluding others).
+ jobs:
+ - test: "Smoke"
+ tags: "--tags=@smoke"
+ ignorePythonVersions: "3.6,3.5"
 
 - job: 'PR'
  dependsOn: []