Activate Javascript test-cases rename_simple and rename_scope.

These reveal current deficiencies in the Javascript generator with `%rename`ing.

Examples/test-suite/javascript/rename_scope_runme.js

@@ -0,0 +1,17 @@
+var rename_scope = require("./rename_scope");
+
+var a = new rename_scope.Natural_UP();
+var b = new rename_scope.Natural_BP();
+
+if (a.rtest() !== 1) {
+  throw new Error("a.rtest(): Expected 1, was " + a.rtest());
+}
+
+if (b.rtest() !== 1) {
+  throw new Error("b.rtest(): Expected 1, was " + b.rtest());
+}
+
+var f = rename_scope.equals;
+if (f === undefined) {
+  throw new Error("Equality operator has not been renamed.");
+}