[IMP] stock: Add context key to avoid send sms
[IMP] stock: Add context key to avoid send sms

In stock, before sending an sms, we check if there aren't the key
'skip_sms' in the context. It is useful, for example, in fsm
application.

TaskID: 2081191
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo