Fix test case

h2/src/test/org/h2/test/db/TestCompatibility.java

@@ -436,6 +436,8 @@ public class TestCompatibility extends TestBase {
         res.next();
         assertEquals("2", res.getString(1));
         assertFalse(res.next());
+        conn.close();
+
         // test isolation-clause
         conn = getConnection("compatibility;MODE=DB2");
         stat = conn.createStatement();