new: [API] fixed two cases where the new filter parameter builder was being naughty
new: [API] fixed two cases where the new filter parameter builder was being naughty

- copy-pasta fail induced skipping of parameters with only NOT parameters fixed
- OR/AND/NOT formatted parameters with singular values (such as '{"OR": "foo"}' now handled correctly

devnull-/MISP,FloatingGhost/MISP,FloatingGhost/MISP,MISP/MISP,devnull-/MISP,Rafiot/MISP,SteveClement/MISP,devnull-/MISP,FIRSTdotorg/MISP,MISP/MISP,devnull-/MISP,FIRSTdotorg/MISP,Rafiot/MISP,Rafiot/MISP,SteveClement/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,FloatingGhost/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,Rafiot/MISP,SteveClement/MISP