[IMP] hr: Add user slash if no employee set
[IMP] hr: Add user slash if no employee set

If employee is not set, the default picture will be user-slash
instead of camera.

Task ID 2221250

closes odoo/odoo#48114

Related: odoo/enterprise#9398
Signed-off-by: Yannick Tivisse (yti) <200a91eb0e5cc4726d6a3430713b580138f34298@odoo.com>

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