Use AccordionList macro on applications index page, remove duped class on task order index page

templates/applications/index.html

@@ -1,4 +1,5 @@
 {% from "components/accordion.html" import Accordion %}
+{% from "components/accordion_list.html" import AccordionList %}
 {% from "components/empty_state.html" import EmptyState %}
 {% from "components/sticky_cta.html" import StickyCTA %}
 {% from "components/icon.html" import Icon %}
@@ -32,7 +33,7 @@
     ) }}
 
   {% else %}
-    <div class="usa-accordion">
+    {% call AccordionList() %}
       {% for application in portfolio.applications|sort(attribute='name') %}
         {% set section_name = "application-{}".format(application.id) %}
         {% set title = "Environments ({})".format(application.environments|length) %}
@@ -76,7 +77,7 @@
           {% endcall %}
         </div>
       {% endfor %}
-    </div>
+    {% endcall %}
   {% endif %}
 
 </div>