ancestral_allele update
Created by: tgrego
Variation Bio::EnsEMBL::Variation::Variation::ancestral_allele method has been deprecated and replaced with Bio::EnsEMBL::Variation::VariationFeature::ancestral_allele.
Bio::EnsEMBL::IO::Translator::SampleGenotypeFeature uses the deprecated method and is now failing, so an update is required.
This fixes the issue by patching the test DBs and the test data object, and updated the deprecated method to the new one.