Auth_token middleware logs env at warning level for missing auth token

[Maru Newby]

The auth_token middleware logs the request env whenever an auth token is not found in the headers:

https://github.com/openstack/keystone/blob/master/keystone/middleware/auth_token.py#L238

Since any production system is likely to have the log level set to warning or above, this results in unnecessary log messages for valid token-less requests (e.g. swift container sync, other auth mechanisms, etc).

If the env is to be logged, could it be at a lower level? Or perhaps not logged at all if delay_auth_decision is set?

[Thierry Carrez (ttx)]

Do not set to FixReleased until it appears in a published development milestone.