Ported l10n_ch_bank and l10n_ch_zip to version 8

These are fields needed for a correct mapping in the future. Because these were missing, I had such a long time to create the file, because there was no unique primary key. So I think, these fields will not cause any problem to other modules, because we are not showing them in the GUI, the will be just filled in the db. And maybe someone needs to use this in some other modules, so then the info is there.