TBR: rps/rpsbot: update NewMountTableDispatcher to go with go/vcl/3029

MultiPart: 3/3
Change-Id: I37a1c8764447db3b842f45efac7c21dd0f6fe9b6
diff --git a/rps/rpsbot/impl_test.go b/rps/rpsbot/impl_test.go
index ac291ac..6bba749 100644
--- a/rps/rpsbot/impl_test.go
+++ b/rps/rpsbot/impl_test.go
@@ -32,8 +32,10 @@
 	if err != nil {
 		t.Fatalf("NewServer() failed: %v", err)
 	}
-	dispatcher, err := mtlib.NewMountTable("")
-
+	dispatcher, err := mtlib.NewMountTableDispatcher("")
+	if err != nil {
+		t.Fatalf("NewMountTableDispatcher() failed: %v", err)
+	}
 	endpoints, err := server.Listen(spec)
 	if err != nil {
 		t.Fatalf("Listen(%v) failed: %v", spec, err)