Bug 1407224 - Bump atom copyright info. r=automatedtester

The atoms were recently updated in https://bugzil.la/1375660, but
that changeset forgot to update the copyright information of this file.

DONTBUILD

MozReview-Commit-ID: CF6PYp6FlO0

--HG--
extra : rebase_source : 68f7a2a7909685f561e77a1f2a95db643add10d5

testing/marionette/atom.js

@@ -1,4 +1,4 @@
-// Copyright 2011-2014 Software Freedom Conservancy
+// Copyright 2011-2017 Software Freedom Conservancy
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.