Object mailing restructred

* restructures object info mail sending

templates/email/checking/shared_data_checked.html

@@ -2,7 +2,7 @@
 
 <div>
     <h2>{% trans 'Shared data checked' %}</h2>
-    <h4>{{obj_identifier}}</h4>
+    <h4>{{obj.identifier}}</h4>
     <hr>
     <article>
         {% trans 'Hello ' %} {{user.username}},
@@ -10,9 +10,9 @@
         <br>
         {% trans 'the following dataset has just been checked' %}
         <br>
-        <strong>{{obj_identifier}}</strong>
+        <strong>{{obj.identifier}}</strong>
         <br>
-        <strong>{{obj_title}}</strong>
+        <strong>{{obj.title}}</strong>
         <br>
         <br>
         {% trans 'This entry is located in' %}