Update sitemap to use ActiveRecord pattern
Update sitemap to use ActiveRecord pattern

The sitemap generators were not updated to use Active Records. This
patch updates the examples as well on how to use the SiteMap generators
with Active Record.

riteshshrv/nereid,usudaysingh/nereid,prakashpp/nereid,prakashpp/nereid,usudaysingh/nereid,fulfilio/nereid,riteshshrv/nereid,fulfilio/nereid