Revert "update koha release : fix hardcoded mysql db hostname"
Revert "update koha release : fix hardcoded mysql db hostname"

This reverts commit a5b6d20d79e04e0f576b8b80725354019429bf2c.

digibib/koha-docker,digibib/koha-salt-docker,digibib/koha-docker,digibib/koha-salt-docker,digibib/koha-docker,digibib/koha-salt-docker,digibib/koha-docker,digibib/koha-salt-docker,digibib/koha-docker,digibib/koha-salt-docker,digibib/koha-docker