[REF] Contract Sale Invoicing: update translations
[IMP] - Assert that the predecessor is available for new link at uncancel
[RMV] - remove usless changes
[RMV] - Remove usless field recurring_invoices
after the total isolation between contract model and account analytic one.
recurring_invoices which was used to mark analytic account as contract became usless
[IMP] - P3 syntax
[IMP] - use @openupgrade.migrate() and openupgrade.logged_query
[IMP] - drop transient table in migration script
oca-travis
Thomas Binsfeld
Carlos Dauden