Reduce the "modules - test app" self-test start-up wait time.

The increased mongo connection timeout in 522d86d
means that the we can decrease the "modules - test app" self-test
application start-up wait internval significantly (since mongo
will now start properly and the self-test can continue).

tools/tests/modules.js

@@ -24,7 +24,7 @@ selftest.define("modules - test app", function () {
       "--driver-package", "dispatch:mocha-phantomjs"
     );
 
-    run.waitSecs(180);
+    run.waitSecs(60);
     run.match("App running at");
     run.match("SERVER FAILURES: 0");
     run.match("CLIENT FAILURES: 0");