Move with_timeout / without_timeout to ApplicationRecord.

db/migrate/20170319000519_add_created_at_index_to_versions.rb

@@ -1,6 +1,6 @@
 class AddCreatedAtIndexToVersions < ActiveRecord::Migration
   def change
-    ActiveRecord::Base.without_timeout do
+    ApplicationRecord.without_timeout do
       add_index :note_versions, :created_at
       add_index :artist_versions, :created_at
       add_index :wiki_page_versions, :created_at

db/migrate/20170330230231_add_forum_post_id_to_tag_requests.rb

@@ -1,6 +1,6 @@
 class AddForumPostIdToTagRequests < ActiveRecord::Migration
   def change
-  	ActiveRecord::Base.without_timeout do
+  	ApplicationRecord.without_timeout do
   		add_column :tag_aliases, :forum_post_id, :integer
   		add_column :tag_implications, :forum_post_id, :integer
   		add_column :bulk_update_requests, :forum_post_id, :integer

db/migrate/20170414005856_add_unique_name_constraint_to_users.rb

@@ -1,6 +1,6 @@
 class AddUniqueNameConstraintToUsers < ActiveRecord::Migration
   def up
-  	ActiveRecord::Base.without_timeout do
+  	User.without_timeout do
 	  	remove_index :users, :name
   		execute "create unique index index_users_on_name on users(lower(name))"
   	end