[#304] syncing QE with the new Atom DB

[angeloprobst]

Closes #304

Making das-query-engine compatible with the new das-atom-db.

[andre-senna]

@angeloprobst

I revisited the code in this branch checking the way we use parameters down the line after DAS.query() is called.

parameters: Optional[Dict[str, Any]] = None,

IMO we should remove Optional and default parameters to {} in this declaration and in the declarations of concrete query engine's query() as well because we could avoid checks for None which are just making the code less clear.

[angeloprobst]

IMO we should remove Optional and default parameters to {}

Done.