To compute the intervals of working time, the function interval_get_multi
used 'hour_to' and 'hour_from' from "resource.calendar.attendance" model. 'hour_to'
and 'hour_from' are not in UTC timezone. All the dates in odoo are compared in UTC.
Then 'hour_to' and 'hour_from' must be converted.
To take into account the minutes in this computation, the minutes from the start date
are added in the variable todo (number of working hours).
opw:648349