[FIX] website_slides: HttpCase should be post_install
[FIX] website_slides: HttpCase should be post_install

Since odoo/odoo@8d5da6e4be05 HttpCase should not be started at install.

closes odoo/odoo#39719

Signed-off-by: Christophe Monniez (moc) <c96e125261f5e7e830d26ea98a02884db1f08bc3@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo