Attribute filter parsing log messages (Re: idpv3 first look)

[Tom Zeller]

>>> We obviously do need to decide whether to deprecate anonymous rules.
>>
>> Not sure about the deprecation, but FWIW I thought those log messages
>> should be lowered to DEBUG.
>
> I filed https://issues.shibboleth.net/jira/browse/IDP-451 to make sure
> that it can be tracked.

I'm going to lower the log messages to DEBUG. If/when we decide to
deprecate, we can bump back up to INFO. I'll update the JIRA issue as
well.