[tests] Avoid crash out of the CI when no accounting is setup

For the moment, commown_contract_forecast does not depend on any accounting setup
module, so the tests that generate invoices crashes. This commit fixes that by
inserting odoo-maintained minimal account data to avoid this.

commown_contract_forecast/tests/test_functional.py

@@ -2,6 +2,8 @@
 
 from dateutil.relativedelta import relativedelta
 
+from odoo import tools
+from odoo.modules.module import get_resource_path
 from odoo.tests.common import at_install, post_install
 
 from odoo.addons.product_rental.tests.common import RentalSaleOrderTC
@@ -22,6 +24,22 @@ def setUp(self):
             )
         )
 
+        if not self.env["account.journal"].search([("type", "=", "sale")]):
+            # When running in a db where the commown module is not installed
+            # (=not the in the CI), no dependency module sets up accounting
+            # and invoice generation crashes; following inserts the minimal
+            # data needed to avoid this:
+            tools.convert_file(
+                self.cr,
+                "commown_contract_forecast",
+                get_resource_path("account", "test", "account_minimal_test.xml"),
+                {},
+                "init",
+                False,
+                "test",
+                self.registry._assertion_report,
+            )
+
     def test_contract_life_cycle(self):
         "Forecast computations should be triggered when (and only when) needed"