[P3] payment_stripe: Exception.message removed
[P3] payment_stripe: Exception.message removed

Apparently missed in 07ab8b6cd2b44aeb91dadc35adf5f4b19f1399b2

In Python 3, there is no Exception.message attribute anymore, this would
lead to cascading exceptions in the stripe_s2s_create handler.

closes odoo/odoo#28141
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo