This change comes as a recommendation from our keystone
engineer, not good practice to log full tokens. Also change
this log message:
'monasca.common.middleware.TokenAuth: 401 No token found.'
to debug level to avoid filling the log with these
messages as the result of a load balancer calling HEAD
without a token.
Change-Id: I6a04e98c398e163fb972020be1e580869b2538d7