Fix delete app/user when IAM role doesn't exist
Better handling of exceptions raised when deleting an app or user where the IAM role is not there for some reason.
PR: #792
Ticket: https://trello.com/c/LSOKnEDZ
Better handling of exceptions raised when deleting an app or user where the IAM role is not there for some reason.
PR: #792
Ticket: https://trello.com/c/LSOKnEDZ