function bootstrap_classes_tinymce($settings)
{
    $styles = array(
        array(
            'title' => 'None',
            'value' => ''
        ),
        array(
            'title' => 'Table',
            'value' => 'table',
        ),
        array(
            'title' => 'Striped',
            'value' => 'table table-striped table-hover',
        ),
        array(
            'title' => 'Bordered',
            'value' => 'table table-bordered table-hover',
        ),
    );

    $settings['table_class_list'] = json_encode($styles);

    return $settings;
}

add_filter('tiny_mce_before_init', 'bootstrap_classes_tinymce');