Clear out all votes when reloading a division

Previously if the member was incorrect in the original load it could
result in orphan votes being left in. It's safer for us to reload all
the votes completely.

lib/data_loader/ukraine/vote_events.rb

@@ -33,17 +33,15 @@ def load!
 
             votes = v_e["votes"]
             Rails.logger.info "Loading #{votes.count} votes..."
+            division.votes.destroy_all
             votes.each do |v|
               party_name = people.party_name_from_id(v["group_id"])
               member = Member.current_on(division.date).find_by(person_id: v["voter_id"], party: party_name) ||
                        Member.find_by!(person_id: v["voter_id"], party: party_name) # Fallback when current_on isn't quite right
 
               vote = division.votes.find_or_initialize_by(member: member)
               if option = popolo_to_publicwhip_vote(v["option"])
-                vote.vote = option
-                vote.save!
-              else
-                vote.destroy
+                division.votes.create!(member: member, vote: option)
               end
             end