Flash RPC transport does not setup properly

Steps to reproduce:
1) Configure an unlocked domain in container.js, i.e, set real hostname values for "default.domain.unlocked.client" and "default.domain.unlocked.server". For example, use "unlocked.shindig.com" and set it to 127.0.0.1 in your hosts file.

2) Navigate to the common container page and force it to use the flash RPC transport by using the query param: http://localhost:8080/containers/commoncontainer/index.html?rpctx=flash

3) Load the "Publish Suscribe Demo" set of gadgets

Expected result: The gadgets render and function
Actual result: The gadgets do not render

If you then remove the "rpctx=flash" query param, the gadgets will work.

Note: You must have the gadget domain be different than the container domain, or RPC simply short-circuits and makes calls directly instead of relying on the rpc transports.