Change Mininet IP from localhost to OCN

Change-Id: Ib4888180a0cc9c812c08cb725fba3813cfe77f1c
diff --git a/TestON/tests/PLAT/PLATdockertest/PLATdockertest.topo b/TestON/tests/PLAT/PLATdockertest/PLATdockertest.topo
index 3501864..f6d50ae 100755
--- a/TestON/tests/PLAT/PLATdockertest/PLATdockertest.topo
+++ b/TestON/tests/PLAT/PLATdockertest/PLATdockertest.topo
@@ -32,7 +32,7 @@
         </ONOSbenchDocker>
 
         <Mininet1>
-            <host>localhost</host>
+            <host>OCN</host>
             <user>sdn</user>
             <password>rocks</password>
             <type>MininetCliDriver</type>