CCBC-416: Map AUTH_ERROR to MAP_CHANGED

The rest of this JIRA ticket is handled in the prior retrychk.c commit,
however in the case where the command is _not_ retried, we don't want to
deliver an AUTH_ERROR to the application.

Change-Id: I3afbdd9b751cb9f0ec4a25be0ce45e60671441bf
Reviewed-on: http://review.couchbase.org/37800
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>