[DoctrineMongoDBBundle] fix the data collector design

src/Symfony/Bundle/DoctrineMongoDBBundle/Resources/views/Collector/mongodb.html.twig

@@ -24,15 +24,17 @@
     <h2>Queries</h2>
 
     {% if not collector.queries %}
-        <em>Query logging is disabled.</em>
+        <p>
+            <em>Query logging is disabled.</em>
+        <p>
     {% elseif not collector.querycount %}
         <p>
             <em>No queries.</em>
         </p>
     {% else %}
         <ul class="alt">
-            {% for i, query in collector.queries %}
-                <li class="{{ i is odd ? 'odd' : 'even' }}">
+            {% for query in collector.queries %}
+                <li class="{{ cycle(['odd', 'even'], loop.index) }}">
                     <div>
                         <code>{{ query }}</code>
                     </div>