Implement DBEntryAdaptor::list_rnaproduct_ids_by_extids()
Implement DBEntryAdaptor::list_rnaproduct_ids_by_extids()

muffato/ensembl,Ensembl/ensembl,Ensembl/ensembl,Ensembl/ensembl,muffato/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,muffato/ensembl,muffato/ensembl