erp5_item: add type classes to Item and Service Report portal types

bt5/erp5_item/PortalTypeTemplateItem/portal_types/Item.xml

@@ -85,6 +85,10 @@
             <key> <string>title</string> </key>
             <value> <string></string> </value>
         </item>
+        <item>
+            <key> <string>type_class</string> </key>
+            <value> <string>Item</string> </value>
+        </item>
       </dictionary>
     </pickle>
   </record>

bt5/erp5_item/PortalTypeTemplateItem/portal_types/Service%20Report.xml

@@ -54,6 +54,10 @@
             <key> <string>title</string> </key>
             <value> <string></string> </value>
         </item>
+        <item>
+            <key> <string>type_class</string> </key>
+            <value> <string>Item</string> </value>
+        </item>
       </dictionary>
     </pickle>
   </record>