Add tokentype in audit log
Add tokentype in audit log

The before decorator adds the tokentype
in the audit log if the serial number is
passed in the request.

Closes #629

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