Provide description for NO_MATCHING_SERVER

Change-Id: Ica53fa29590375bffe33bf73c9373e0f81cd78fe
Reviewed-on: http://review.couchbase.org/28122
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>