sonar work

gfsBackendService/src/main/java/org/eclipse/openk/gridfailureinformation/service/AddressService.java

@@ -54,13 +54,12 @@ public class AddressService {
 
     public List<String> getStreets(String postcode, String community, Optional<String> district) {
 
-        if(district.equals(Optional.empty())){
+        if(!district.isPresent()){
             return addressRepository.findStreetsByPostcodeAndCommunity(postcode, community);
         }
         else{
             return addressRepository.findStreetsByPostcodeAndCommunityAndDistrict(postcode, community, district.get());
         }
-
     }
 
     public List<String> getHousenumbers(String postcode, String community, String street) {