returns the job with the given id

    :param job_id: <str> id of the job
    :param conn: <rethinkdb.DefaultConnection>
    :return: <dict> job with the given id

def get_job_by_id(job_id, conn=None):
    """returns the job with the given id

    :param job_id: <str> id of the job
    :param conn: <rethinkdb.DefaultConnection>
    :return: <dict> job with the given id
    """
    job = RBJ.get(job_id).run(conn)
    return job