Replace null char and other control characters

[mdoering]

I am facing an issue with postgres that fails when having a null char in data.
Instead of replacing every inpout into postgres I would prefer to let the dwca-io lib handle this and (optionally) replace the null char and maybe other control characters

See gbif/checklistbank#38

[cgendreau]

The TabularFileNormalizer can do it but at the moment it can only be used if you rewrite the file.
We could avoid that by simply exposing the normalizeLine method. org.gbif.dwca.record.RecordImpl is already looping on all cells so maybe I would move org.gbif.dwca.record.CleanUtils code into TabularFileNormalizer and create a new method there like normalizeValue.

[mdoering]

sounds good. Would be nice if you can also supply your custom method to clean values. The issue is fixed within clb now, so its not pressing from my side