Log to DEBUG level a Repo (or subclass) pretty-printed

def debug_log_repo(repo):
    """Log to DEBUG level a Repo (or subclass) pretty-printed"""
    ds_str = juicer.utils.create_json_str(repo,
                                          indent=4,
                                          cls=juicer.common.Repo.RepoEncoder)
    juicer.utils.Log.log_debug(ds_str)