Do not throw on no adaptor in get_all_alternative_translations().
Do not throw on no adaptor in get_all_alternative_translations().

danstaines/ensembl,Ensembl/ensembl,muffato/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,at7/ensembl,muffato/ensembl,mjg17/ensembl,danstaines/ensembl,Ensembl/ensembl,willmclaren/ensembl,at7/ensembl,at7/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,willmclaren/ensembl,muffato/ensembl,danstaines/ensembl,Ensembl/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,at7/ensembl,mjg17/ensembl,muffato/ensembl,Ensembl/ensembl