Tests assume that `l10n_generic_coa` is installed, which is not the case for several
cases. We replace it creating a minimal account base data for the company test that
makes it to work.
* Standard migration procedure
* README by fragments
* Fixed tests
* Change
* Fix related no readonly in account_banking_pain_base
* Override default partner bank account check on account_payment_partner
* Convert Python date to string
Odoo has added a constraint for avoiding a company currency change if there
are move lines, making these tests to fail, as the currency is changed to EUR.
With this commit, we create a new company with EUR currency for avoiding the
problem. An alternative solution could be to delete all the existing move lines
on the company, but as that can be problematic if there are additional
constraints (extra modules, locking date, etc), I have chosen the other approach.
