[FIX] crm: check if attendees are present

Check if the attendees are correctly present. We replace
assertEqual by assertIn to be sure that the order of the
attendee doesn't have an impact on the test

task-2287846
COM PR: odoo/odoo#69484
ENT PR: odoo/enterprise#17792

Related: odoo/upgrade#2401
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/crm/tests/test_crm_lead_smart_calendar.py

@@ -131,5 +131,5 @@ class TestCRMLeadSmartCalendar(TestCrmCommon):
             'stop': datetime(2020, 12, 13, 22),
         })
         self.assertEqual(len(event.attendee_ids), 2)
-        self.assertEqual(event.attendee_ids[0].partner_id, self.user_sales_leads.partner_id)
-        self.assertEqual(event.attendee_ids[1].partner_id, self.contact_1)
+        self.assertIn(self.user_sales_leads.partner_id, event.attendee_ids.partner_id)
+        self.assertIn(self.contact_1, event.attendee_ids.partner_id)