Feature/668 install script sandbox error

Fix for #668 (second try). I had misunderstood the explanation in https://help.salesforce.com/HTViewSolution?id=000193090&language=en_US. Thought the stuff after the equals was being used as the new email address. @jlantz explained to me what they were trying to say.

NEED TO WAIT FOR BUILD JOB TO FINISH BEFORE MERGING