[Sheriff-o-matic] Refactor cards and get rid of ct-failure-cards

Tools/GardeningServer/model/ct-builder-failure-group-data.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
+<link rel="import" href="ct-builder-list.html">
+
 <script>
 function CTBuilderFailureGroupData(failure, bot, url) {
   this.bot = bot;
   this.failure = failure;
+  this.url = url;
+  this.builderList = new CTBuilderList(failure);
   this.category = 'builder';
-  this.url = url;
 };
 
 CTBuilderFailureGroupData.prototype.getAnnotations = function() {
   return [this.failure.annotations()];
 };
 
 // FIXME: This function should be replaced and callers should just pass the original object.
 CTBuilderFailureGroupData.prototype.dataToExamine = function() {
   return {url: this.url};
 };
 
 CTBuilderFailureGroupData.prototype.failureKeys = function() {
   return [this.failure.keys()];
 };
 </script>