Add Kpi creation waiting time

src/tests/scenario2/tests/test_functional_create_service.py

@@ -128,6 +128,7 @@ def test_scenario_kpi_values_created(monitoring_client: MonitoringClient):
     """
     response = monitoring_client.GetKpiDescriptorList(Empty())
     kpi_descriptors = random.choices(response.kpi_descriptor_list, k=2)
+    time.sleep(5)
 
     for kpi_descriptor in kpi_descriptors:
         response = monitoring_client.GetInstantKpi(kpi_descriptor.kpi_id)