Set redis-server version to 5.0 during upgrade

PROD-36960

Change-Id: Ic289e6a66fcd0e0206ae103d1c05dbc9da694884
diff --git a/tcp_tests/managers/saltmanager.py b/tcp_tests/managers/saltmanager.py
index fbbb9b8..431ef7b 100644
--- a/tcp_tests/managers/saltmanager.py
+++ b/tcp_tests/managers/saltmanager.py
@@ -508,3 +508,7 @@
                         user=kubernetes_admin_user,
                         password=kubernetes_admin_password)
             )
+
+    def get_minions_by_target(self, tgt):
+        result = self.local(tgt=tgt, fun="test.ping")
+        return result['return'][0].keys()