Portal defines the 'portal.mixin' that overrides a method from 'mail.thread'.
However no explicit inheritance is given between those two mixin. Some Odoo
models notably inherit from 'portal.mixin' and not from 'mail.thread'. It
makes no sense to override a method the model does not explicitly inherit.
In this commit we move the override on 'mail.thread' by checking the model
also inherits from 'portal.mixin' before doing portal-specific computation.
This fixes tests introduced previously.
Task-3175768 (Mail: check inheritances / overrides)
closesodoo/odoo#112573
Related: odoo/enterprise#37039
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>
Thibault Delavallée
03aa01aff7