slapos_erp5: allow customer to see the Subcription Request Module

master/bt5/slapos_erp5/LocalRolesTemplateItem/subscription_request_module.xml

 <local_roles_item>
  <local_roles>
+  <role id='F-CUSTOMER'>
+   <item>Auditor</item>
+  </role>
   <role id='F-PRODUCTION*'>
    <item>Auditor</item>
   </role>

master/bt5/slapos_erp5/PortalTypeRolesTemplateItem/Subscription%20Request%20Module.xml

 <type_roles>
+  <role id='Auditor'>
+   <property id='title'>Member</property>
+   <multi_property id='category'>function/customer</multi_property>
+   <multi_property id='base_category'>function</multi_property>
+  </role>
   <role id='Auditor'>
    <property id='title'>Production</property>
    <multi_property id='category'>function/production*</multi_property>