[ENSCORESW-596]. Do not call disconnect_if_idle on a DBAdaptor.
[ENSCORESW-596]. Do not call disconnect_if_idle on a DBAdaptor.

The method was called on the wrong object. Swithced around and tested

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