oracle template: don't sed /etc/init/tty.conf on older releases
oracle template: don't sed /etc/init/tty.conf on older releases

Signed-off-by: Dwight Engen <1793d65cf7b9eefb2bb8f5bee9a4b8ba782c26da@oracle.com>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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