[IMP] hr_attendance_rfid: test performance improvement

- Switch to setUpClass for avoiding repeat the same setup for each test.
- Include context keys for avoiding mail operations overhead.

hr_attendance_rfid/tests/test_hr_attendance_rfid_process.py

@@ -9,12 +9,13 @@
 
 
 class TestHrAttendance(TransactionCase):
-    def setUp(self):
+    @classmethod
+    def setUpClass(cls):
         super().setUp()
-        self.employee_model = self.env["hr.employee"]
-        self.test_employee = self.browse_ref("hr.employee_al")
-        self.rfid_card_code = "5b3f5"
-        self.test_employee.rfid_card_code = self.rfid_card_code
+        cls.employee_model = cls.env["hr.employee"]
+        cls.test_employee = cls.env.ref("hr.employee_al")
+        cls.rfid_card_code = "5b3f5"
+        cls.test_employee.rfid_card_code = cls.rfid_card_code
 
     def test_valid_employee(self):
         """Valid employee"""