CheckpointManager: Add label to Monotonic lastBySeqno
CheckpointManager: Add label to Monotonic lastBySeqno

Change-Id: Id74fc65ff2f158f8f5aacae898b71fc7ab80b429
Reviewed-on: http://review.couchbase.org/112699
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: James Harrison <5c25a7b3db09830813688775bfc8e6de736a230c@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine