function mytheme_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id =='user_pass'){
    $form['#submit'][] = 'mytheme_password_redirect';
  }
}
/**
* Redirects user after password reset form is filled
*/
function mytheme_password_redirect(&$form, &$form_state){
  $form_state['redirect'] = 'user/lougout';
}