Fixed login error message box in LoginScreen page

Fix added for showing error message returned from server to client
browser. User is now notified with proper error messages returned by
server.

https://bugzilla.redhat.com/show_bug.cgi?id=1293870

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

install/ui/src/freeipa/widgets/LoginScreen.js

@@ -272,12 +272,12 @@ define(['dojo/_base/declare',
                 }
                 this.set('view', 'login');
             } else {
+                otp_f.set_value('');
+                new_f.set_value('');
+                ver_f.set_value('');
                 val_summary.add_error('login', result.message);
             }
 
-            otp_f.set_value('');
-            new_f.set_value('');
-            ver_f.set_value('');
         },
 
         refresh: function() {
@@ -426,4 +426,4 @@ define(['dojo/_base/declare',
     ];
 
     return LoginScreen;
-});
+});