slapos_erp5: fix add missing object

master/bt5/slapos_erp5/ModuleTemplateItem/portal_certificate_authority.xml

-<module>
- <id>portal_certificate_authority</id>
- <permission_list>
-  <permission type='tuple'>
-   <name>Access contents information</name>
-   <role>Manager</role>
-   <role>Member</role>
-  </permission>
- </permission_list>
- <portal_type>Certificate Authority Tool</portal_type>
- <title>portal_certificate_authority</title>
-</module>
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