removed tests for RawContigAdaptor::get_contig_id_by_id and RawContigAdaptor::get_internal_id_by_id
removed tests for RawContigAdaptor::get_contig_id_by_id and RawContigAdaptor::get_internal_id_by_id

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