[16.0][MIG][sale_stock_picking_invoicing]

[rvalyi]

cc @mbcosta @renatonlima

EDIT: I put it in draft as I'm not too sure yet what should should be done for analytical fields around 65fa883#diff-d8a5810924c9e2509dedcd08b9b6aea083a8543de434b845310fbe7f0c501b58R163
Suggestions are welcome.

[mbcosta]

@rvalyi @renatonlima about the changes:

• Update README in History about migration
  Should we change the README files from .rst to .md or this change depends of a repo update?

• For get Analytic Lines I use the value from analytic_distribution in the Dict of _prepare_invoice_line here https://github.com/OCA/OCB/blob/16.0/addons/sale/models/sale_order_line.py#L1122

        analytic_account_id = self.order_id.analytic_account_id.id
        if self.analytic_distribution and not self.display_type:
            res['analytic_distribution'] = self.analytic_distribution
        if analytic_account_id and not self.display_type:
            analytic_account_id = str(analytic_account_id)
            if 'analytic_distribution' in res:
                res['analytic_distribution'][analytic_account_id] = res['analytic_distribution'].get(analytic_account_id, 0) + 100
            else:
                res['analytic_distribution'] = {analytic_account_id: 100}

This value and the sale_line_ids are the only two fields informed when the ''Invoice Type" are out_refund ( Should be informed other fields? Is there another "Invoice Type" that should not copy Sale fields? I let a TODO there https://github.com/akretion/account-invoicing/blob/16.0-mig-sale_stock_picking_invoicing/sale_stock_picking_invoicing/wizards/stock_invoice_onshipping.py#L169 )

Test the copy of field:

Analytic Lines seems to be change as Mixin in the module https://github.com/OCA/OCB/tree/16.0/addons/analytic

• Use Common Tests from stock_picking_invoicing https://github.com/OCA/account-invoicing/blob/16.0/stock_picking_invoicing/tests/common.py , reduce duplicate code

I did the changes in new commits to make easy to see the diff, but can be just a amend in one MIG commit, let me know if will be better only one commit.

With this changes I think the PR can be move from status Draft to Ready to Review