ullCourse check additional mandatory user fields before booking

Workflow: @see https://www.ullright.org/ullWiki/show/ullcourse-booking-online-payment-workflow

/apps/frontend/modules/ullCourse/templates/showSuccess.php

Change booking link to "checkUserFields" action:

        <?php echo link_to(
          __('Book this course', null, 'ullCourseMessages'),
          'ullCourse/checkUserFields?slug=' . $doc['slug'],
          array('class' => 'ull_course_show_book_link big_button')
          )
        ?>

/apps/frontend/config/app.yml

all:
  ull_course:
    mandatory_user_fields:      [ 'first_name', 'last_name', 'email', 'phone_number', 'street', 'city', 'post_code', 'country' ]

/apps/frontend/lib/generator/columnConfigCollection/UllUserColumnConfigCollection.class.php

  public function adjustColumnConfigForEditAccount(UllUser $user)
  {
    ...  
    
    $this->setIsRequired(array(
      ...
    ));

    // Adjust required fields for course booking
    $uri_memory = new UriMemory();
    if ($uri_memory->has('editAccountReturnUri', 'ullUser')) {
      $mandatoryCourseUserFields = sfConfig::get('app_ull_course_mandatory_user_fields', array());
      $this->setIsRequired($mandatoryCourseUserFields);
    }
  }