Pull request #149: Quality fixes

Merge in ITB/json-validator from development to master

* commit 'd9afb727af6f2cb49ca9c5d571a827ef0eb843f4':
  Quality fixes

Author: costas80

jsonvalidator-common/src/main/java/eu/europa/ec/itb/json/validation/JSONValidator.java

@@ -54,7 +54,6 @@
 import java.util.List;
 import java.util.UUID;
 import java.util.function.Function;
-import java.util.stream.Collectors;
 
 /**
  * Component that carries out the validation of provided JSON content.