STC changes to make smoke test more reliable

Change-Id: I8ecf2581b12e618bf3fe41baedf5c5decdd77221
diff --git a/tools/test/scenarios/net-smoke.xml b/tools/test/scenarios/net-smoke.xml
index 2aad758..91131c6 100644
--- a/tools/test/scenarios/net-smoke.xml
+++ b/tools/test/scenarios/net-smoke.xml
@@ -42,6 +42,7 @@
         <dependency name="Net-Teardown" requires="~Host-Intent-Connectivity,
                                                   ~P2P-Intent-Connectivity,
                                                   ~Net-REST,
-                                                  ~Net-Create-Flows"/>
+                                                  ~Net-Create-Flows,
+                                                  ~Net-topo"/>
     </group>
 </scenario>