Fix pike to queens job weather fail

Related-Prod: PROD-36426
Change-Id: I9b454cd9010e8b920d356be29dd98a494714db8b
diff --git a/tcp_tests/tests/system/test_upgrade_pike_queens.py b/tcp_tests/tests/system/test_upgrade_pike_queens.py
index aa6997e..0b35add 100644
--- a/tcp_tests/tests/system/test_upgrade_pike_queens.py
+++ b/tcp_tests/tests/system/test_upgrade_pike_queens.py
@@ -321,4 +321,4 @@
         job_result, job_description = dt.start_job_on_jenkins(
             job_name=job_name,
             job_parameters=job_parameters)
-        assert job_result == 'SUCCESS', job_description
+        assert job_result in ['SUCCESS', 'UNSTABLE'], job_description