Add CompanyTestMixin to sale advance payment tests

Closes #12845

modules/sale_advance_payment/tests/test_module.py

@@ -1,10 +1,11 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
+from trytond.modules.company.tests import CompanyTestMixin
 from trytond.tests.test_tryton import ModuleTestCase
 
 
-class SaleAdvancePaymentTestCase(ModuleTestCase):
+class SaleAdvancePaymentTestCase(CompanyTestMixin, ModuleTestCase):
     'Test Sale Advance Payment module'
     module = 'sale_advance_payment'
 

modules/sale_advance_payment/tryton.cfg

@@ -3,6 +3,7 @@ version=7.1.0
 depends:
     account
     account_invoice
+    company
     ir
     res
     sale