fix migraiton of mail_usability

mail_usability/data/mail_data.xml

@@ -10,4 +10,9 @@
         <field name="body_html">${object.body | safe}</field>
     </record>
 
+        <template id="message_notification_email_usability">
+<div t-raw="message.body"/>
+        </template>
+
+
 </odoo>

mail_usability/models/mail.py

@@ -15,10 +15,10 @@ class MailThread(models.AbstractModel):
         _logger.debug('Skip automatic subscribe notification')
         return False
 
-    def _message_auto_subscribe_notify(self, partner_ids):
+    def _message_auto_subscribe_notify(self, partner_ids, template):
         if self._active_message_auto_subscribe_notify():
             return super(MailThread, self)._message_auto_subscribe_notify(
-                partner_ids)
+                partner_ids, template)
         else:
             return True
 

mail_usability/models/res_partner.py

@@ -16,9 +16,8 @@ class ResPartner(models.Model):
                 send_after_commit=True, model_description=False,
                 mail_auto_delete=True):
         # use an empty layout for notification by default
-        if not self._context.get('custom_layout'):
-           self = self.with_context(
-		custom_layout='mail_usability.mail_template_notification')
+        if not message.layout:
+            message.layout = 'mail_usability.message_notification_email_usability'
         # Never auto delete notification email
         # fucking to hard to debug when message have been delete
         mail_auto_delete = False