If an exception is caught by ir.mail_server.send_email in mail_tracking module,
the mail.tracking.email record will appear in error but the related mailing
trace would still appear as sent because mail.mail._postprocess_sent_message is
called without any failure_type in mail.mail._send in the mail module (as Exception
is not raised after being caught in mail_tracking module).
Since _postprocess_sent_message method not only sets the mailing.trace state in
mass_mailing module but can also delete the mail.mail records in mail module,
we need to ensure the mailing.trace is written accordingly to the tracking here,
and avoid having the mass_mailing module set a 'sent' status if we had an exception,
hence the usage of a context key to ignore possible writes.
* Change references to mail_mail_statistics model with mail_trace
* Change references to mail.mass_mailing model with mailing.mailing
* Change reference to statistics_ids field with mailing_trace_ids
* Change reference to send_mail method with action_send_mail
* Replace mailing.mailing name for required subject field
* fix view reference not_blacklisted with filter_not_email_bl
* fix not-stored compute, set value for all the records