With these changes, we allow the contract line start date to be computed
using the order confirmation date. When the product is configured with
any of the options set in contract_start_date_method other than manual,
the start date will be calculated based on the established date and the
selected period.
Additionally, we can force the month in which we will work in case the
frequency is yearly, quarterly, or semesterly.
Is not added support for daily, weekly or monthlylastday in this commit.
* Change the method called in the view
* Complete the create_invoice method
* Bump version + authoring
* Correct bad call of method
Small Documentation
* Add super call in python test
* FIX bad field names causing bad quantities in sale.order.line
