ODT export doesn't produce 'real' odt documents but 'office html' (?) documents

The issue is exactly the one described here:

https://github.com/sbraconnier/jodconverter/issues/297 .

For tracking I'll copy here the issues with the produced ODT files:

• the default view of this document is 'web' - see XWIKI-18293
• LibreOffice does not display it with its name but as 'Untitled', as if it was an unknown file
• When using "save as", this document cannot be saved as anything else than html formats (a regular document can be saved as ms office formats, etc)
  
• the tracing of comments and history is not available in this document either, which would be available in a standard odt file.