4e84027dbc2e updated the grouping fields method to receive the grouped
instance but it did not adapt to the returned type which is a list.
Closes#12718
(grafted from 099eaaf2255b752db61c8c91441e430bf148795a)
--HG--
branch : 7.0
f6e6e1921a54 changed the property into a method with the grouped instance as
parameter. So other modules extending the method must be updated.
Closes#12634
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
get_required_version does not need to use .dev0 suffix anymore.
The download URL must be empty for development version.
Source Code must point to Heptapod repository.
Foundation email is used as author email.
Cédric Krier