Using ONOS NodePorts instead of port-forwarding in Scale test

Change-Id: If29c7730d3a60a9eba57a665a5f2f586704232c9
diff --git a/tests/scale/Voltha_Scale_Tests.robot b/tests/scale/Voltha_Scale_Tests.robot
index 04163a3..11c9abb 100644
--- a/tests/scale/Voltha_Scale_Tests.robot
+++ b/tests/scale/Voltha_Scale_Tests.robot
@@ -56,9 +56,9 @@
 
 *** Variables ***
 ${ONOS_SSH_IP}  127.0.0.1
-${ONOS_SSH_PORT}    8101
+${ONOS_SSH_PORT}    30115
 ${ONOS_REST_IP}  127.0.0.1
-${ONOS_REST_PORT}    8181
+${ONOS_REST_PORT}    30120
 
 ${BBSIM_REST_IP}    127.0.0.1
 ${BBSIM_REST_PORT}    50071