Tee centralauth wfDebug()s to vanadium for Gangliafication

This is a little hacky, but I've done this enough times now that I'm pretty
sure I could get something useful set up in time for the HTTPS deployments
tomorrow. I'll remove it when things stabilize.

Change-Id: Ie4a931131257bde7f1420f38239cda6803c49783
Merge "Tee centralauth wfDebug()s to vanadium for Gangliafication" into production