slapos_erp5: Contract Invitation Token does not seem to be used

master/bt5/slapos_erp5/PortalTypeRolesTemplateItem/Contract%20Invitation%20Token.xml

 <type_roles>
-  <role id='Assignor'>
-   <property id='title'>Group company</property>
-   <multi_property id='categories'>local_role_group/group</multi_property>
-   <multi_property id='category'>group/company</multi_property>
-   <multi_property id='base_category'>group</multi_property>
-  </role>
 </type_roles>
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