Remove configured interface for dynamic clustering

Fixes issues with test servers having different names for default
interface. Still allows someone to configure which interface if there
are multiple configured on a server

Change-Id: I4d095ef44926b2109626f064abab102f1550066f
diff --git a/TestON/tests/HA/HAscaling/HAscaling.params.intents b/TestON/tests/HA/HAscaling/HAscaling.params.intents
index 0ce1246..53b96b5 100644
--- a/TestON/tests/HA/HAscaling/HAscaling.params.intents
+++ b/TestON/tests/HA/HAscaling/HAscaling.params.intents
@@ -30,7 +30,7 @@
     <scaling>1,3b,3,3b,5b,5,5b,7b,7,7b,5b,5,5b,3b,3,3b,1</scaling>
     <server>
         <port>8000</port>
-        <interface>eth0</interface>
+        <interface></interface>
     </server>
     <apps></apps>
     <ONOS_Configuration>