EE backport for new application settings service

app/controllers/admin/application_settings_controller.rb

@@ -5,7 +5,11 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
   end
 
   def update
-    if @application_setting.update_attributes(application_setting_params)
+    successful = ApplicationSettings::UpdateService
+      .new(@application_setting, current_user, application_setting_params)
+      .execute
+
+    if successful
       redirect_to admin_application_settings_path,
         notice: 'Application settings saved successfully'
     else

app/services/application_settings/base_service.rb

+module ApplicationSettings
+  class BaseService < ::BaseService
+    def initialize(application_setting, user, params = {})
+      @application_setting, @current_user, @params = application_setting, user, params.dup
+    end
+  end
+end

app/services/application_settings/update_service.rb

+module ApplicationSettings
+  class UpdateService < ApplicationSettings::BaseService
+    def execute
+      @application_setting.update(@params)
+    end
+  end
+end