Adding old unit tests to test suite.

These tests are copied straight over. They'll still run, but they're
using the old system.

Change-Id: If494519e52ddf858a9febfc55bdae830468cb3c8
diff --git a/test/023-many-interfaces/src/Main.java b/test/023-many-interfaces/src/Main.java
new file mode 100644
index 0000000..666a41c
--- /dev/null
+++ b/test/023-many-interfaces/src/Main.java
@@ -0,0 +1,6 @@
+public class Main {
+    static public void main(String[] args) throws Exception {
+        boolean timing = (args.length >= 1) && args[0].equals("--timing");
+        ManyInterfaces.run(timing);
+    }
+}