Simpletest not working dut to new form field form_token

In simpletest entrypoint with only check if edit is different from form_id and op now it needs to check for form_token aswell (see patch) otherwise you get

Class "form token" not found

Another question is do we need to check if token is valid in entrypoint? We could use it because we can. But is there any real danger? I dont think so afterall simpletest module runs on very few drupal installations.

Patch in this follow up is for HEAD version.