Strengthening test case slightly to verify that the security exception is the expected one.

test/src/test/java/hudson/bugs/JnlpAccessWithSecuredHudsonTest.java

@@ -126,6 +126,7 @@ public class JnlpAccessWithSecuredHudsonTest extends HudsonTestCase {
                         fail("SECURITY-206: " + channel.call(new Attack(f.getAbsolutePath())));
                     } catch (SecurityException x) {
                         System.out.println("expected: " + x);
+                        assertTrue(x.getMessage().contains("http://jenkins-ci.org/security-144"));
                     }
                     return;
                 }