Fix bug in parsing prepared statements with transaction handling in replication mode reported in [pgpool-general: 1877].
Fix bug in parsing prepared statements with transaction handling in replication mode reported in [pgpool-general: 1877].

Parse() automatically starts a transaction for non SELEC query to keep
consistency among nodes in replication mode. But it does not set
allow_close_transaction variable. If wrong query comes in, the
transaction goes into an abort state but pgpool does not close the
transaction. Thus next query causes error because the transaction is
still in abort status.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres