101 swift drv fixes

1. We will use patched Repose to authenticate a user and return
the credentials/token of the user in x-project-id header.
2. Users do not provide or be aware of their project-ids.
3. After patched Repose is deployed for Deuce, this authhook.py
should be entirely removed.
You are right!

We don't need any change for production run now.  

Revised.  

Thanks!