spec: use absolute dates in CreateAssignmentViewSpec

fixes CNVS-25505

Change-Id: Id3fbe1724499b66e23bb6a96d2e08eab7137a46f
Reviewed-on: https://gerrit.instructure.com/68137
Tested-by: Jenkins
Reviewed-by: Derek Bender <djbender@instructure.com>
Product-Review: Keith T. Garner <kgarner@instructure.com>
QA-Review: Keith T. Garner <kgarner@instructure.com>

Author: Strand McCutchen

spec/coffeescripts/views/assignments/CreateAssignmentViewSpec.coffee

@@ -30,10 +30,10 @@ define [
 
   buildAssignment1 = ->
     date1 =
-      "due_at": new Date("August 28, 2013").toISOString()
+      "due_at": new Date("2103-08-28T00:00:00").toISOString()
       "title":"Summer Session"
     date2 =
-      "due_at": new Date("August 28, 2013").toISOString()
+      "due_at": new Date("2103-08-28T00:00:00").toISOString()
       "title":"Winter Session"
 
     buildAssignment(