title: Does Codeception support automatic rollback in unit tests for Symfony?
body: <p>I've looked through the Codeception documentation and I've seen that it mentions automatic rollback/database cleanup for functional tests, but I haven't seen anything about unit tests.</p>
  
  <p>This is my configuration for unit tests, but there are visible database changes after I run the unit test suite.</p>
  
  <pre><code># Codeception Test Suite Configuration
  #
  # Suite for unit or integration tests.
  
  actor: UnitTester
  bootstrap: bootstrap.php
  modules:
    enabled:
      - Asserts
      - Doctrine2:
          depends: Symfony
          cleanup: true
      - \Helper\Unit
  </code></pre>
  
  <p>Does Codeception support cleanup for unit tests? If so, how do you get them working?</p>