erp5_run_my_doc: Move Mixin Definition to specific bt5 field

bt5/erp5_run_my_doc/PortalTypeTemplateItem/portal_types/Review.xml

@@ -55,9 +55,7 @@
         <item>
             <key> <string>type_mixin</string> </key>
             <value>
-              <tuple>
-                <string>UrlMixin</string>
-              </tuple>
+              <tuple/>
             </value>
         </item>
       </dictionary>

bt5/erp5_run_my_doc/PortalTypeTypeMixinTemplateItem/type_mixin.xml

+<type_mixin>
+ <portal_type id="Review">
+  <item>UrlMixin</item>
+ </portal_type>
+</type_mixin>
\ No newline at end of file

bt5/erp5_run_my_doc/bt/template_portal_type_type_mixin_list

+Review | UrlMixin
\ No newline at end of file