Fix integration tests for edx solutions

Is this a dictionary comprehension? Could be something like:
   
    {
        choice.text: choice.find_element_by_css_selector("input").is_selected()
        for choice in self._mcq.find_elements_by_css_selector(".choice")
    }

A question of style actually. If you're prefer explicit loops to list/dict comprehensions than it's perfectly fine.