fix the machine for SRBridging

Change-Id: I97b67902cd29475c4945586f629fb116ef905637
diff --git a/TestON/tests/USECASE/SegmentRouting/SRBridging/SRBridging.params b/TestON/tests/USECASE/SegmentRouting/SRBridging/SRBridging.params
index 021be12..27a2bae 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRBridging/SRBridging.params
+++ b/TestON/tests/USECASE/SegmentRouting/SRBridging/SRBridging.params
@@ -2,7 +2,7 @@
     <testcases>5,6,7,8,15,16,17,18,25,26,27,28,35,36,37,38,45,46,47,48,55,56,57,58,65,66,67,68,75,76,77,78</testcases>
 
     <GRAPH>
-        <nodeCluster>BM</nodeCluster>
+        <nodeCluster>VM</nodeCluster>
         <builds>20</builds>
     </GRAPH>