jobs: migrate mass updates to ActiveJob.

Also fixes a bug where mod actions weren't logged on mass updates.
Creating the mod action silently failed because it was called when
CurrentUser wasn' set.

app/controllers/moderator/tags_controller.rb

@@ -1,13 +1,12 @@
 module Moderator
   class TagsController < ApplicationController
     before_action :moderator_only
-    rescue_from TagBatchChange::Error, :with => :error
 
     def edit
     end
 
     def update
-      Delayed::Job.enqueue(TagBatchChange.new(params[:tag][:antecedent], params[:tag][:consequent], CurrentUser.user.id, CurrentUser.ip_addr), :queue => "default")
+      TagBatchChangeJob.perform_later(params[:tag][:antecedent], params[:tag][:consequent], CurrentUser.user, CurrentUser.ip_addr)
       redirect_to edit_moderator_tag_path, :notice => "Post changes queued"
     end