[SDFAB-540] Add UP4 test with attached UE and GTP routed traffic

Ensure that when UEs are attached, traffic to the BESS UPF is not
terminated in the fabric, but forwarded to the BESS host

Change-Id: I5dbd95fda9e51d63cdc09a204b4a28fca8cfe098
diff --git a/TestON/tests/USECASE/SegmentRouting/UP4/UP4.params b/TestON/tests/USECASE/SegmentRouting/UP4/UP4.params
index 113d33d..98dc41e 100644
--- a/TestON/tests/USECASE/SegmentRouting/UP4/UP4.params
+++ b/TestON/tests/USECASE/SegmentRouting/UP4/UP4.params
@@ -1,5 +1,5 @@
 <PARAMS>
-    <testcases>1</testcases>
+    <testcases>1,2</testcases>
 
     <GRAPH>
         <nodeCluster>pairedleaves</nodeCluster>