[FIX] mis_builder: ensure ci

Some modules could insert data to the default company that could make
the tests checks fail. With this patch we ensure, at least for this test
cases to be performed with a brand new company.

mis_builder/tests/test_data_sources.py

@@ -35,6 +35,14 @@ def _create_move(self, date, amount, debit_acc, credit_acc):
         move._post()
         return move
 
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        # Perform the tests with a brand new company to avoid intrusive data from other
+        # modules added to the default company
+        cls.company = cls.env["res.company"].create({"name": "Company Test"})
+        cls.env.user.company_id = cls.company
+
     def setUp(self):
         super().setUp()
         self.account_model = self.env["account.account"]