Fix so that we use 3 config servers when we have 3 or more nodes

tests/cloudconfig/multiple_configservers/filedistribution.rb

@@ -53,7 +53,7 @@ def deploy_test_app(add_searcher=nil)
     end
 
     app = app.configserver("node1").num_hosts(@num_hosts)
-    if @num_hosts == 3
+    if @num_hosts >= 3
       app = app.configserver("node2").
               configserver("node3")
     end