The status of the dataset import job. States include:
ACTIVE
CREATE_PENDING, CREATE_IN_PROGRESS, CREATE_FAILED
CREATE_PENDING
CREATE_IN_PROGRESS
CREATE_FAILED
DELETE_PENDING, DELETE_IN_PROGRESS, DELETE_FAILED
DELETE_PENDING
DELETE_IN_PROGRESS
DELETE_FAILED
CREATE_STOPPING, CREATE_STOPPED
CREATE_STOPPING
CREATE_STOPPED