Refactor DataProvider & ParserDesc

[KaiVolland]

The DataParser should be modified to act more like the parsing of a Style.

Therfore we should make use of the DataParserConstructable interface from 'geostyler-style'.

[chrismayer]

The DataParser should be modified to act more like the parsing of a Style

Can you specify this a bit more, @KaiVolland? TIA!

[KaiVolland]

It's about choosing/setting the Parser in the DataProvider.

I think that we should make use of the DataParserConstructable in the DataProvider.
Almost like we do with the StyleParserConstructable in the StyleLoader.

This way the ParserDesc would become obsolete and the code would be less diverse.

[KaiVolland]

The DataParserConstructable and StyleParserConstructable have been removed so this issue is not relevant any more.