Fix atom-application tests
Fix atom-application tests

When closing a window with a file that does not exist, Atom opens a
dialog asking the users if they want to save the changes. This dialog
prevented the tests from finishing correctly.

brettle/atom,Mokolea/atom,PKRoma/atom,PKRoma/atom,atom/atom,PKRoma/atom,Mokolea/atom,atom/atom,Mokolea/atom,brettle/atom,atom/atom,brettle/atom