Add missing role definition.

master/bt5/slapos_erp5/PortalTypeRolesTemplateItem/Image.xml

 <type_roles>
+  <role id='Assignor'>
+   <property id='title'>Group company</property>
+   <multi_property id='category'>group/company</multi_property>
+   <multi_property id='base_category'>group</multi_property>
+  </role>
   <role id='Auditor'>
    <property id='title'>Security for Shacache (Auditor)</property>
    <multi_property id='category'>role/member</multi_property>

master/bt5/slapos_erp5/bt/revision

-48
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+49
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