#55 Can be assign a role to members of my Workgroup

Remove Owner on Workgroup (use role MASTER instead)
"find_citizen_by_id" not return user anymore, use "find_citizen_by_id_with_user" instead

src/main/resources/sql/functions/article/find_articles.sql

@@ -21,7 +21,7 @@ begin
     from (
         select
             a.*,
-            find_citizen_by_id(a.created_by_id) as created_by,
+            find_citizen_by_id_with_user(a.created_by_id) as created_by,
             find_workgroup_by_id(a.workgroup_id) as workgroup,
             count_vote(a.id) as votes,
             count_opinion(a.id) as opinions,