For large datasets, disabling pattern compression in RAxML (-H flag) is very inefficient, and actually not needed for find_mislabels, so:
- epa_trainer: add an option to use pattern compression for GTRCAT model, this settings is then stored in refjson file
- epa_classifier, find_mislabels: always use pattern compression policy specified in refjson file (i.e. the same that was used for training)