[Koha] zebra utility after koha upgrade

[Mason James]

> hi George
> you should not need to manually add any cronjob for indexing,
>
> in newer koha versions (like 19.05) the indexing is handled automatically
>

if you are having problems with indexing, its possibly due to incorrect zebradb file/dir permissions

check in /var to confirm that the instance's zebra files/dirs are correctly owned by it's koha user