Update latest CELab binary

Also, did a one line fix for the client cloud enrollment test due to
the 2016 test machine change.

The latest CELab patch includes improved nested Win10 performance, and CrOS
nested VM beta support.

Validation: tryjob https://cr-buildbucket.appspot.com/build/8863238187133959552

Change-Id: I71f793b8d9c3485c9fb463465a917671b7119cdc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2545876
Commit-Queue: Xiang Ji <jxiang@google.com>
Reviewed-by: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829093}

chrome/test/enterprise/e2e/.vpython

@@ -11,8 +11,8 @@ python_version: "2.7"
 
 wheel: <
   name: "infra/celab/celab/windows-amd64"
-  # Source: https://ci.chromium.org/p/celab/builders/ci/Windows/b8877198546412479520
-  version: "LveMRjyFsgdFha5yWzmDnWx3MqNWA5j9Xt_brzfxWx8C"
+  # Source: https://ci.chromium.org/p/celab/builders/ci/Windows/b8863242163218578192
+  version: "IQHknf30R2DyRmnCQ9PWQToO1x-rS7ecoTeaDqncGmoC"
 >
 
 # googleapiclient

chrome/test/enterprise/e2e/policy/cloud_management_enrollment_token/cloud_management_enrollment_token.py

@@ -44,6 +44,6 @@ class CloudManagementEnrollmentTokenTest(ChromeEnterpriseTestCase):
         os.path.join(local_dir, 'cloud_enrollment_webdriver.py'))
     # Verify CBCM status legend
     self.assertIn('Machine policies', output)
-    self.assertIn('CLIENT2019', output)
+    self.assertIn('CLIENT2016', output)
     self.assertIn(token, output)
     self.assertIn('Policy cache OK', output)