spec: selenium fragile specs

Change-Id: I7c9e21919a6e34cd90359eee44d4534b075f942b
Reviewed-on: https://gerrit.instructure.com/31855
Reviewed-by: Bryan Madsen <bryan@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>
Tested-by: Bryan Madsen <bryan@instructure.com>