[FIX] website: error for rendering of the sitemap template. qweb can't render the xmlns attribute.
Merge pull request #1039 from odoo-dev/8.0-fix-sitemap-chm

[FIX] website: error for rendering of the sitemap template. qweb can't render the xmlns attribute.
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64