New system property h2.dropRestrict (work in progress).

h2/src/test/org/h2/test/test-1.2.txt

@@ -5983,9 +5983,6 @@ SELECT * FROM CHILDREN_CLASS12;
 > rows: 4
 
 DROP VIEW CHILDREN_CLASS1;
-> exception
-
-DROP VIEW CHILDREN_CLASS1 CASCADE;
 > ok
 
 DROP VIEW CHILDREN_CLASS2;