external sources allowed in external sources module only

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@11747 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_dms/PortalTypeAllowedContentTypeTemplateItem/allowed_content_types.xml

 <allowed_content_type_list>
  <portal_type id="Document Module">
   <item>Text</item>
-  <item>External Library File</item>
-  <item>External Web Page</item>
   <item>Spreadsheet</item>
   <item>Presentation</item>
   <item>PDF</item>
@@ -15,6 +13,10 @@
  <portal_type id="External Library File">
   <item>Book</item>
  </portal_type>
+ <portal_type id="External Source Module">
+  <item>External Web Page</item>
+  <item>External Library File</item>
+ </portal_type>
  <portal_type id="File">
   <item>Role Definition</item>
  </portal_type>