The reason of failed jenkins job in cluster-under-test will be shown in  a test result

PROD-36050
Change-Id: I1160d46e99751f4e714c459e3d07110958c913e3
diff --git a/tcp_tests/tests/system/test_upgrade_contrail.py b/tcp_tests/tests/system/test_upgrade_contrail.py
index dee3148..e853d04 100644
--- a/tcp_tests/tests/system/test_upgrade_contrail.py
+++ b/tcp_tests/tests/system/test_upgrade_contrail.py
@@ -44,7 +44,7 @@
         job_parameters = {
             'ASK_CONFIRMATION': False
         }
-        update_control_vms = dt.start_job_on_jenkins(
+        job_result, job_description = dt.start_job_on_jenkins(
             job_name=job_name,
             job_parameters=job_parameters)
-        assert update_control_vms == 'SUCCESS'
+        assert job_result == 'SUCCESS', job_description