Changed from NetworkGraph to Topology and added del_db as function in ramcloud driver
diff --git a/TestON/tests/RCOnosPerf4nodes/RCOnosPerf4nodes.py b/TestON/tests/RCOnosPerf4nodes/RCOnosPerf4nodes.py
index f8fc498..0b73201 100644
--- a/TestON/tests/RCOnosPerf4nodes/RCOnosPerf4nodes.py
+++ b/TestON/tests/RCOnosPerf4nodes/RCOnosPerf4nodes.py
@@ -22,9 +22,13 @@
         main.RamCloud3.stop_serv()
         main.RamCloud4.stop_serv()
         main.ONOS1.handle.sendline("~/ONOS/onos.sh rc deldb")
+        main.ONOS1.handle.sendline("y")
         main.ONOS2.handle.sendline("~/ONOS/onos.sh rc deldb")
+        main.ONOS2.handle.sendline("y")
         main.ONOS3.handle.sendline("~/ONOS/onos.sh rc deldb")
+        main.ONOS3.handle.sendline("y")
         main.ONOS4.handle.sendline("~/ONOS/onos.sh rc deldb")
+        main.ONOS4.handle.sendline("y")
         time.sleep(10)
         main.RamCloud1.start_coor()
         main.RamCloud1.start_serv()