put back subordination categories on person, even if it will in reality stored on career

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3685 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/Person.py

@@ -175,5 +175,5 @@ class Person:
     },
   )
 
-  _categories = ( 'region', 'gender', 'product_line', 'nationality', 'marital_status'
-                )
+  _categories = ( 'region', 'gender', 'product_line', 'nationality', 'marital_status',
+                  'subordination')