title: jQuery validation not work in select2 tags
body: <p>I add jQuery validation plugin for my form and I work with select2 plugin. for check select2 validation I add <code>ignore: "",</code> for validatioin plugin like this :</p>
  
  <pre><code>$("#form").validate({
      ignore: "",
      rules: {
          tags: {
              required: true,
          },
      },
      messages: {
          tags: {
              required: "error ! required field",
          },
      },
      highlight: function (element) {
          $(element).closest('.form-control').addClass('has-error');
      },
      unhighlight: function (element) {
          $(element).closest('.form-control').removeClass('has-error');
      },
      errorElement: 'div',
      errorClass: 'help-block',
      errorPlacement: function (error, element) {
          if (element.parent('.input-group').length) {
              error.insertAfter(element.parent());
          } else {
              error.insertAfter(element);
          }
      }
  });
  </code></pre>
  
  <p>This worked and show required message But when i choose tags, form validation not work and not remove required message. How do fix this ?!</p>
  
  <p><a href="http://jsfiddle.net/X6V2s/193/" rel="nofollow">DEMO</a> </p>