Tests were split between dom/notification and
dom/test/mochitest/notification. Moving them all to the same place.

MozReview-Commit-ID: IP1YtIBmHcD


--HG--
rename : dom/tests/mochitest/notification/MockServices.js => dom/notification/test/mochitest/MockServices.js
rename : dom/tests/mochitest/notification/NotificationTest.js => dom/notification/test/mochitest/NotificationTest.js
rename : dom/tests/mochitest/notification/mochitest.ini => dom/notification/test/mochitest/mochitest.ini
rename : dom/tests/mochitest/notification/test_bug931307.html => dom/notification/test/mochitest/test_bug931307.html
rename : dom/tests/mochitest/notification/test_notification_basics.html => dom/notification/test/mochitest/test_notification_basics.html
rename : dom/tests/mochitest/notification/test_notification_storage.html => dom/notification/test/mochitest/test_notification_storage.html