PURPOSE
Clean mailing code and ease understanding by replacing some old selection
keys by new ones better highlighting their use and aligned with other keys
used notably in mass mailing or SMS.
SPECIFICATIONS
Use shorted and mail-related keys. Indeed we already have sms_ and sn_ for
sms and snailmail related failure type. We therefore update failure_type for
mail as
* "UNKNOWN" -> "unknown", a generic unknown of uncategorized error;
* "RECIPIENT" -> "mail_email_missing", indicates email address is
invalid;
* "SMTP" -> "mail_smtp", connection issue;
"BOUNCE" key is never used and removed. Actually we use a bounce state for
bounced emails / traces so this key has no use.
LINKS
Task ID-2377974
Community PR odoo/odoo#61467
Enterprise PR odoo/enterprise#14633
Upgrade PR odoo/upgrade#1907
Thibault Delavallée
c178a7829f