Fix performance issue with Audit log.
Fix performance issue with Audit log.

The audit log will fail with a lot of tokens,
since PI tried to resolve the realm of the tokens "**".

jh23453/privacyidea,wheldom01/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea,jh23453/privacyidea,wheldom01/privacyidea,jh23453/privacyidea,jh23453/privacyidea,wheldom01/privacyidea,privacyidea/privacyidea,wheldom01/privacyidea,privacyidea/privacyidea,jh23453/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea,jh23453/privacyidea,wheldom01/privacyidea,wheldom01/privacyidea