* db: removed DBConfig.batchSize() configuration   > with recent MySQL server and jdbc driver, it is already auto split batch according to max_allowed_packet   > refer to com.mysql.cj.AbstractPreparedQuery.computeBatchSize   > and MySQL prefers large batch as the default max_allowed_packet value is getting larger * db: added Repository.upsert() and Repository.batchUpsert()
* db: removed DBConfig.batchSize() configuration
  > with recent MySQL server and jdbc driver, it is already auto split batch according to max_allowed_packet
  > refer to com.mysql.cj.AbstractPreparedQuery.computeBatchSize
  > and MySQL prefers large batch as the default max_allowed_packet value is getting larger
* db: added Repository.upsert() and Repository.batchUpsert()

neowu/core-ng-demo-project,neowu/core-ng-demo-project