Convert the job description to init params that can be handled by the class constructor

        Args:
            job_details: the returned job details from a describe_training_job API call.
            model_channel_name (str): Name of the channel where pre-trained model data will be downloaded

        Returns:
             dictionary: The transformed init_params

def _prepare_init_params_from_job_description(cls, job_details, model_channel_name=None):
        """Convert the job description to init params that can be handled by the class constructor

        Args:
            job_details: the returned job details from a describe_training_job API call.
            model_channel_name (str): Name of the channel where pre-trained model data will be downloaded

        Returns:
             dictionary: The transformed init_params

        """
        init_params = super(Estimator, cls)._prepare_init_params_from_job_description(job_details, model_channel_name)

        init_params['image_name'] = init_params.pop('image')
        return init_params