Add id to the logs of checkpoint persistence

Add the id to the logs of checkpoint persistence so that we will have the
sequence number/checkpoint id in case a timeout occurs on checkpoint
persistence

Change-Id: Ifd3c70c9d40de43f0b3f1fdc1cf495ee0dc95d60
Reviewed-on: http://review.couchbase.org/40513
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: Sriram Ganesan <sriram@couchbase.com>