auth_token_info is a common field that subclasses of RequestContext
add. It contains things like the token itself and the entire catalog,
both of which are undesirable to log. The token is a security concern
and the catalog is huge, which bloats the logs an unacceptable amount.
This change removes the auth_token_info key from the logging dict
that we return to the log formatter, which eliminates both problems.
Change-Id: If5ebaa3c1859d32cd05f51defe173fc625b21af5
Closes-Bug: 1866705
1dd72d1d20