CBQE-0 add return true if move node b/t zone successfully.

Change-Id: If44562767d228dc93e92670498ee69a59bf91b6a
Reviewed-on: http://review.couchbase.org/40436
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>