Bug 1095219 - Fix failing smart-home-test/unit/card_manager_test.js and re-enable it



https://bugzilla.mozilla.org/show_bug.cgi?id=1095219
Does this work for you locally? I tried this earlier, and it did not. In fact, it looks like it's still failing: https://taskcluster-artifacts.s3-us-west-2.amazonaws.com/aclU66x_RWOv9sfkEkpSpw/1/public/logs/live_backing.log?AWSAccessKeyId=AKIAIZOQG4W6WG3PH3RQ&Expires=1415332580&Signature=QvwbVl58R4rqqOieb6%2BLDdYNK0M%3D