fix test.. since r30276 a null secret results in empty string for auth password.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30580 71c3de6d-444a-0410-be80-ed276b4c234a

test/src/test/java/hudson/tasks/MailerTest.java

@@ -122,7 +122,7 @@ public class MailerTest extends HudsonTestCase {
         d.setSmtpAuth(null,null);
         submit(new WebClient().goTo("configure").getFormByName("config"));
         assertEquals(false,d.getUseSsl());
-        assertNull(d.getSmtpAuthUserName());
-        assertNull(d.getSmtpAuthPassword());
+        assertNull("expected null, got: " + d.getSmtpAuthUserName(), d.getSmtpAuthUserName());
+        assertEquals("", d.getSmtpAuthPassword());
     }
 }