[FIX] account_move_template: Post-install test + fallback to load CoA

Since odoo/odoo@d0342c8, the default existing company is not getting a
CoA automatically, provoking than the current tests fail with the error:

odoo.exceptions.UserError: No journal could be found in company My Company (San Francisco) for any of those types: sale

Thus, we put tests post-install for being sure localization modules are
installed, the same as AccountTestInvoicingCommon does, but we don't
inherit from it, as it creates an overhead creating 2 new companies and
loading their CoA and some more stuff, while we don't need all of that.

Besides, if you don't have `l10n_generic_coa` installed, you can't use
another CoA (like `l10n_es`) easily, so we put little code to select the
first available CoA.

Author: victoralmau

account_move_template/tests/test_account_move_template_options.py

@@ -2,13 +2,23 @@
 # License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
 from odoo import Command
 from odoo.exceptions import UserError, ValidationError
-from odoo.tests.common import Form, TransactionCase
+from odoo.tests.common import Form, TransactionCase, tagged
 
 
+@tagged("-at_install", "post_install")
 class TestAccountMoveTemplateEnhanced(TransactionCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
+        if not cls.env.company.chart_template_id:
+            # Load a CoA if there's none in current company
+            coa = cls.env.ref("l10n_generic_coa.configurable_chart_template", False)
+            if not coa:
+                # Load the first available CoA
+                coa = cls.env["account.chart.template"].search(
+                    [("visible", "=", True)], limit=1
+                )
+            coa.try_loading(company=cls.env.company, install_demo=False)
         cls.Move = cls.env["account.move"]
         cls.Journal = cls.env["account.journal"]
         cls.Account = cls.env["account.account"]