def submit_job(name, jq, jobdef, params):
    """
    Submit an AWS Batch job to the defined job queue
    :param name: the job name
    :param jq: the job queue name
    :param jobdef: the job definition string (e.g. mg-usearch-jobdef:4)
    :param params: dict of container overrides key/value pairs
    :return: dict of return information from aws batch command
    """
