Before this commit, conversion between worked hours and days in
resource_calendar_attendance was calculated but in reality there is no
unambigous way to do this. Eg in Belgium the morning working period is
4 hours, the one in the afternoon is 3 hours 36 minutes, while both of
them are still counted as half days.
To mediate this, the duration in days is explicitely added to
resource.calendar.attendance, with sensible default being provided
(half a day for morning and afternoon periods, 0 for lunch).
task-3131517
Part-of: odoo/odoo#133145
Rob Coekaerts
a9b804b1ad