Fix typo ('AUTORITY' should be 'AUTHORITY')

Change-Id: I526323985cd20da0a450791f025640900eb5cce2
Reviewed-on: http://review.couchbase.org/29936
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>