The fiscal years are created centered on the passed date such that if the current day change during the execution, the fiscal year is still usable. Also fiscal year can be created for a range of dates such that it is guarantee that the dates are in the fiscal year. And finally remove datetime and dateutil import when they are not used. Closes #9977
Purchase Secondary Unit Module ############################## The purchase secondary unit module adds a secondary unit of measure on purchase lines. The secondary quantity and unit price are kept synchronized with the quantity and unit price. The secondary unit is defined on the product supplier or on the product with its factor against the purchase unit.