'Create deprecated components.'

def _create_deprecated_components(self):

    parent_vertical = self.course_fixture.get_nested_xblocks(category='vertical')[0]
    self.course_fixture.create_xblock(parent_vertical.locator, XBlockFixtureDesc('poll', 'Poll', data=load_data_str('poll_markdown.xml')))
    self.course_fixture.create_xblock(parent_vertical.locator, XBlockFixtureDesc('survey', 'Survey'))
