LPS-48566 DDL record search does not result any results

Hey Mike, this is one possible fix for the issue we've talked about.

The main problem was that `ddmContent` and `ddm/fieldName` fields were not being analysed.

That's ok, but the weird thing is that when we perform a full reindex on control panel, these fields become analysed and that's why the seach worked after this operation.

It seems the full reindex is not respecting the `type_mappings` file.

/cc @gallindo

Thanks