[IMP] stock_secondary_unit: test performance improvement

- Include context keys for avoiding mail operations overhead.

stock_secondary_unit/tests/test_stock_secondary_unit.py

@@ -8,6 +8,16 @@ class TestProductSecondaryUnit(TransactionCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
+        # Remove this variable in v16 and put instead:
+        # from odoo.addons.base.tests.common import DISABLED_MAIL_CONTEXT
+        DISABLED_MAIL_CONTEXT = {
+            "tracking_disable": True,
+            "mail_create_nolog": True,
+            "mail_create_nosubscribe": True,
+            "mail_notrack": True,
+            "no_reset_password": True,
+        }
+        cls.env = cls.env(context=dict(cls.env.context, **DISABLED_MAIL_CONTEXT))
         # Active multiple units of measure security group for user
         cls.env.user.groups_id = [(4, cls.env.ref("uom.group_uom").id)]
         cls.StockPicking = cls.env["stock.picking"]