updated test case with is calls replacing ok also, when adding_mapping_path, do not expect the method to order coord systems by rank, it will use the first argument as assembled, the second argument as component
updated test case with is calls replacing ok
also, when adding_mapping_path, do not expect the method to order coord systems by rank, it will use the first argument as assembled, the second argument as component

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