Import I18n into some files that were using it

closes:  CORE-1202

by fixing these, we can get rid of our wepback provide plugin for I18n

test plan:
* these spec files should still pass

Change-Id: I5cc4bbc8d4fdb308cf9cfcf00cdc76b5b259f7bd
Reviewed-on: https://gerrit.instructure.com/143483
Tested-by: Jenkins
Reviewed-by: Clay Diffrient <cdiffrient@instructure.com>
QA-Review: Tucker McKnight <tmcknight@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>

spec/coffeescripts/handlebars_helpersSpec.js

@@ -26,6 +26,7 @@ import tz from 'timezone'
 import detroit from 'timezone/America/Detroit'
 import chicago from 'timezone/America/Chicago'
 import newYork from 'timezone/America/New_York'
+import I18n from 'i18n-js'
 
 const {contains} = assertions
 

spec/coffeescripts/jsx/discussion_topics/DiscussionTopicKeyboardShortcutModalSpec.js

@@ -21,6 +21,8 @@ import DiscussionTopicKeyboardShortcutModal from 'jsx/discussion_topics/Discussi
 import React from 'react'
 import ReactDOM from 'react-dom'
 import TestUtils from 'react-addons-test-utils'
+import I18n from 'i18n!KeyboardShortcutModal'
+
 
 const SHORTCUTS = [
   {