compute_bonus route raises an error
compute_bonus route raises an error

bonus computation is handled by an assignment submitted notification,
but raises an error to catch difficulties.

jcpeterson/Dallinger,Dallinger/Dallinger,jcpeterson/Dallinger,Dallinger/Dallinger,Dallinger/Dallinger,berkeley-cocosci/Wallace,Dallinger/Dallinger,suchow/Wallace,jcpeterson/Dallinger,berkeley-cocosci/Wallace,jcpeterson/Dallinger,Dallinger/Dallinger,suchow/Wallace,berkeley-cocosci/Wallace,jcpeterson/Dallinger,suchow/Wallace