erp5_credential: add proxy roles in ERP5Site_newPersonCredentialUpdate.

because credential_request.submit() is now guarded by Modify portal content permission.

bt5/erp5_credential/SkinTemplateItem/portal_skins/erp5_credential/ERP5Site_newPersonCredentialUpdate.xml

@@ -52,6 +52,16 @@
             <key> <string>_params</string> </key>
             <value> <string>default_email_text=None, last_name=None, first_name=None, gender=None, nationality=None, password=None, date_of_birth=None, default_telephone_telephone_country=None, default_telephone_text=None, default_mobile_telephone_telephone_country=None, default_mobile_telephone_text=None, default_fax_text=None, default_credential_question_question=None, default_credential_question_question_free_text=None, default_credential_question_answer=None,  function=None, activity_list=None, skill_list=None, default_address_city=None, default_address_street_address=None, default_address_zip_code=None,default_address_region=None,default_image_file=None, description=None, dialog_id=\'\', **kw</string> </value>
         </item>
+        <item>
+            <key> <string>_proxy_roles</string> </key>
+            <value>
+              <tuple>
+                <string>Assignee</string>
+                <string>Author</string>
+                <string>Owner</string>
+              </tuple>
+            </value>
+        </item>
         <item>
             <key> <string>id</string> </key>
             <value> <string>ERP5Site_newPersonCredentialUpdate</string> </value>