Replace test setuptools command by unittest discover

tests/test_module.py

@@ -0,0 +1,14 @@
+
+# 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 SalePaymentTestCase(CompanyTestMixin, ModuleTestCase):
+    'Test SalePayment module'
+    module = 'sale_payment'
+
+
+del ModuleTestCase