[IMP] partner: find default avatar based on gravatar

Task: https://www.odoo.com/web?debug=#id=8137&view_type=form&model=project.task&action=333&active_id=131
Pad: https://pad.odoo.com/p/r.lVlmyH1yY7REpZvS
Hello @tde-banana-odoo 
Create New User (Select profile pics) profile pics can't view after save the record. Any suggestion why not inserted image pics in database. this problem produce only master, 8.0
<b>View this:</b> https://www.youtube.com/embed/fX_ieldSWbg