The mail caused by warn_if_longer|shorter_than attribute should consider the mail setting in a job too

Current Situation

If you configure the warn_if_longer_than or warn_if_shorter_than attribute then an email is sent when the specified time is reached.
A possibly mail setting in the job doesn't used.

<job  warn_if_longer_than="10">
    <settings >
        <mail_on_error ><![CDATA[yes]]></mail_on_error>
        <mail_on_warning ><![CDATA[false]]></mail_on_warning>
        <log_mail_to ><![CDATA[xx@sos-berlin.com]]></log_mail_to>
    </settings>
    <script  language="shell">
        <![CDATA[
sleep 60
        ]]>
    </script>
</job>

Only the settings in the ./config/factory.ini are used.
If the log_mail_to entry is empty in the ./config/factory.ini then the mail is not sent even the job has a configured "to" recipient.

Desired Behavior

A mail setting in the job has to be consider for the "warn_if_longer|shorter_than" mails