eager loading Rails before rake task (#9)

* eager loading Rails before rake task

* Code cleanup

lib/tasks/active_record_anonymizer.rake

@@ -25,6 +25,8 @@ namespace :anonymizer do
   namespace :populate do
     desc "populate anonymize columns for all models"
     task all: :environment do
+      Rails.application.eager_load!
+
       ActiveRecordAnonymizer.models.each do |model|
         puts "Anonymizing #{model.name}..."
         model.find_each do |record|