Auth token supports deprecated names for paste conf options

The auth_token middleware ignored the deprecated name for options
passed into it by paste. With this change, deployers can use either
the current or deprecated name for a conf option.

Change-Id: Ief8bfc127fbbefdb3625ade18e78ff11220f77d1
Fix paste config option conversion for auth options

When the auth plugin was added, the options were removed from the
options that get included in the option conversion routine, which
causes option conversion to fail for those options.

Change-Id: Ia1afaad339881800799742bd171b44c531ffe217
Adding audit middleware to keystonemiddleware

move audit middleware from pyCADF to keystonemiddleware

Implements: blueprint audit-middleware
Change-Id: I2069806cf7c1fd926e791809da011c244942a4ab
Merge "Adding audit middleware to keystonemiddleware"
Merge "Auth token supports deprecated names for paste conf options"
Merge "Fix paste config option conversion for auth options"