UPF_Tests.cfg: fix wrong mp_verify_gtp name

The proper name is mp_verify_gtp_actions.

jenkins is not affected because it uses another .cfg from
docker-playground.git.

Change-Id: Ia13407db795021a2c3e2923c08b63ad6cdd6b0f9
diff --git a/upf/UPF_Tests.cfg b/upf/UPF_Tests.cfg
index fc410b6..06ef1d0 100644
--- a/upf/UPF_Tests.cfg
+++ b/upf/UPF_Tests.cfg
@@ -11,7 +11,7 @@
 [TESTPORT_PARAMETERS]
 
 [MODULE_PARAMETERS]
-UPF_Tests.mp_verify_gtp := false;
+UPF_Tests.mp_verify_gtp_actions := false;
 
 [MAIN_CONTROLLER]