CHO test fixes: Check host IPs and make sure dhcp servers are always connected in HAGG topo

Change-Id: I26d8ecadce38c37f50c4bfef05ff555018b088b4
(cherry picked from commit 469d4ac4b19655db1215ce03946e24f3e563c3f6)
diff --git a/TestON/tests/CHOTestMonkey/CHOTestMonkey.params b/TestON/tests/CHOTestMonkey/CHOTestMonkey.params
index 80a0b0b..1452741 100644
--- a/TestON/tests/CHOTestMonkey/CHOTestMonkey.params
+++ b/TestON/tests/CHOTestMonkey/CHOTestMonkey.params
@@ -407,6 +407,7 @@
         </topo4>
         <mininetArgs></mininetArgs>
         <loadTopoSleep>5</loadTopoSleep>
+        <excludeSwitches></excludeSwitches>
     </TOPO>
 
     <CASE1>