Published version is always displayed when running A/B test on MVC site

Steps to reproduce

1. Install Alloy MVC site + CMO

2. Edit some page and create couple of "Ready to publish" versions for this page.

3. Navigate to CMO, create new A/B test for this page, select published version as original and "Ready to publish" versions as Version 1 and Version 2, save and start the test

4. Open target page several times in different browsers (or clear browser cookies between visits)

Expected: different page versions are displayed and corresponding statistics is displayed in A/B test report.

Observed: original (published) page version is always displayed. A/B test report statistics and browser cookies correspond to different versions.