FIX: Incorrect arguments were being passed to Jobs::ClosePoll.

Also fix spec that wasn't testing anything.

plugins/poll/plugin.rb

@@ -221,10 +221,15 @@ after_initialize do
 
       def schedule_jobs(post)
         Poll.where(post: post).find_each do |poll|
-          Jobs.cancel_scheduled_job(:close_poll, poll_id: poll.id)
+          job_args = {
+            post_id: post.id,
+            poll_name: poll.name
+          }
+
+          Jobs.cancel_scheduled_job(:close_poll, job_args)
 
           if poll.open? && poll.close_at && poll.close_at > Time.zone.now
-            Jobs.enqueue_at(poll.close_at, :close_poll, poll_id: poll.id)
+            Jobs.enqueue_at(poll.close_at, :close_poll, job_args)
           end
         end
       end