Use application logger in set_original_heading_id

The pull request adding the original heading was done before we started
using `ApplicationLogger` in rake tasks.

lib/tasks/budgets.rake

@@ -15,14 +15,13 @@ namespace :budgets do
 
   desc "Update investments original_heading_id with current heading_id"
   task set_original_heading_id: :environment do
-    puts "Starting"
+    ApplicationLogger.new.info "Setting original_heading_id to investments"
     Budget::Investment.find_each do |investment|
       unless investment.original_heading_id.present?
         investment.update_column(:original_heading_id, investment.heading_id)
       end
       print "."
     end
-    puts "Finished"
   end
 
 end