Use proper logger

Author: nygrenh

app/background_tasks/kafka_batch_update_points_task.rb

@@ -46,7 +46,7 @@ def run
         RestClient.post("#{@kafka_bridge_url}/api/v0/event", { topic: 'user_course_progress', payload: message }.to_json, { content_type: :json, authorization: "Basic #{@kafka_bridge_secret}" })
       end
       task.destroy!
-      puts "Batch publish finished for #{course.name}"
+      Rails.logger.info "Batch publish finished for #{course.name}"
     end
   end