When setting the authorization code, a refresh token is generated in
the background and stored in a system parameter.
However, when saving the general settings (res.config.settings)
without changing the authorization code, the refresh token is deleted.
The refresh token should only be deleted if the authorization was
removed.
This was not the case as the set_param is always called and a value is
only computed when the authorization code has changed. The current
value was never retrieved.
Set a ir.config_parameter only when it a value has changed.
closesodoo/odoo#35028
Signed-off-by: Jérome Maes (jem) <jem@openerp.com>
David Dufresne
921fab992d