Add setting for enabling / disabling test reports

InvenTree/report/templates/report/inventree_test_report.html

@@ -61,6 +61,7 @@ content: "{% trans 'Stock Item Test Report' %}";
         </h2>
         <p>{{ part.description }}</p>
         <p><i>{{ stock_item.location }}</i></p>
+        <p><i>Stock Item ID: {{ stock_item.pk }}</i></p>
     </div>
     <div class='img-right'>
         <img src="{% part_image part %}">