veyron/services/mounttable: Remove dependence on rt.R().

Change-Id: If24d6546e00e7cff21ad08da8c5e7c687b5c765c
diff --git a/services/mounttable/lib/mounttable_test.go b/services/mounttable/lib/mounttable_test.go
index 7ec967c..ee79761 100644
--- a/services/mounttable/lib/mounttable_test.go
+++ b/services/mounttable/lib/mounttable_test.go
@@ -452,8 +452,11 @@
 func init() {
 	testutil.Init()
 	// Create the runtime for each of the three "processes"
-	rootRT = rt.Init()
+
 	var err error
+	if rootRT, err = rt.New(); err != nil {
+		panic(err)
+	}
 	if aliceRT, err = rt.New(); err != nil {
 		panic(err)
 	}