The status of the BatchPrediction. This element can have one of the following values:
PENDING - Amazon Machine Learning (Amazon ML) submitted a request to generate
predictions for a batch of observations. INPROGRESS - The process is underway.
FAILED - The request to perform a batch prediction did not run to completion.
It is not usable. COMPLETED - The batch prediction process completed successfully.
DELETED - The BatchPrediction is marked as deleted. It is not usable.