CCBC-504: Add replica info to cbc hash

Change-Id: Id6873f90cb65806a7282836dff4b4a603d44e2ce
Reviewed-on: http://review.couchbase.org/41148
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>