refactoring: transform bucket query to async model
Was made determining uniq set of replicaset by set of buckets that avoid send the same queries to the same replicas. Bucket exec query function was transformed to async mode. (#141 (closed))
Was made determining uniq set of replicaset by set of buckets that avoid send the same queries to the same replicas. Bucket exec query function was transformed to async mode. (#141 (closed))