[ENSCORESW-1199]. Initial tests for SliceAdaptor::get_genome_component_from_slice.
[ENSCORESW-1199]. Initial tests for SliceAdaptor::get_genome_component_from_slice.

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