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.
Step 1 is probably sufficient here. We don't run pecan that way in production any how; and provide documentation for both Apache2 and Nginx setups (in my deployment pr).
So Step 2 should probably just be a "start the deuce server" or "restart the deuce server" kind of comment.