query_supervisor configuration and parallel queries support and functionl test refactoring

tests/integration/functional/hive_fork_manager/app_api/account_operations_view_test.sql

@@ -125,19 +125,6 @@ END;
 $BODY$
 ;
 
-DROP FUNCTION IF EXISTS haf_admin_test_when;
-CREATE FUNCTION haf_admin_test_when()
-    RETURNS void
-    LANGUAGE 'plpgsql'
-VOLATILE
-AS
-$BODY$
-BEGIN
-    --NOTHING TODO HERE
-END
-$BODY$
-;
-
 DROP FUNCTION IF EXISTS haf_admin_test_then;
 CREATE FUNCTION haf_admin_test_then()
     RETURNS void