Checks whether a given user can access given cron job.

def CheckCronJobAccess(self, username, cron_job_id):
    """Checks whether a given user can access given cron job."""

    self._CheckAccess(
        username, str(cron_job_id),
        rdf_objects.ApprovalRequest.ApprovalType.APPROVAL_TYPE_CRON_JOB)