Behat stability in switches_edit_group.feature

[Gold]

It feels like the following false negative happens a lot. We should probably look at why this may be happening and see if we a) need the test or b) can make it more reliable.

--- Failed steps:

001 Scenario: Turning on and off switches on Group Edit page (Bug 1431569) # /var/lib/jenkins/workspace/mahara-gerrit/test/behat/features/site_content/switches_edit_group.feature:70
      Then I should see "About | The Avengers" # /var/lib/jenkins/workspace/mahara-gerrit/test/behat/features/site_content/switches_edit_group.feature:142
        The text "About | The Avengers" was not found anywhere in the text of the current page. (Behat\Mink\Exception\ResponseTextException)

223 scenarios (222 passed, 1 failed)
6656 steps (6653 passed, 1 failed, 2 skipped)