CUSTOM ingestion: proxy role

This is wrong, I still have to understand how DMS can be used to upload
a file while making sure that if a file with same reference already
exists it is not edited in place but always a new version is created.

bt5/erp5_ingestion/SkinTemplateItem/portal_skins/erp5_ingestion/Document_convertToBaseFormatAndDiscoverMetadata.xml

@@ -52,6 +52,14 @@
             <key> <string>_params</string> </key>
             <value> <string>filename=None, user_login=None, input_parameter_dict=None</string> </value>
         </item>
+        <item>
+            <key> <string>_proxy_roles</string> </key>
+            <value>
+              <tuple>
+                <string>Manager</string>
+              </tuple>
+            </value>
+        </item>
         <item>
             <key> <string>id</string> </key>
             <value> <string>Document_convertToBaseFormatAndDiscoverMetadata</string> </value>