[FIX] gamification: don't use multimode from render_template
[FIX] gamification: don't use multimode from render_template

If render_template get list and not id, a dict is returned.
Force the param to be a int, allow to don't use the multimode from render_template.

Avoid to get message like:
 <p>{1: u'\n        </p><p>Congratulation, you have received the badge <strong>Autobiographer</strong> !\n        </p>\n\n'}
 <p>{2: u'\n        </p><p>Congratulation, you have received the badge <strong>Autobiographer</strong> !\n        </p>\n\n'}
 <p>{3: u'\n        </p><p>Congratulation, you have received the badge <strong>Student</strong> !\n        </p>\n\n'}
 <p>{4: u'\n        </p><p>Congratulation, you have received the badge <strong>Supporter</strong> !\n        </p>\n\n'}

ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,dfang/odoo,dfang/odoo,dfang/odoo,ygol/odoo,dfang/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo