modifying get_DBAdaptor() to only throw an error if $no_alias_check was on
modifying get_DBAdaptor() to only throw an error if $no_alias_check was on

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