[BUG] No access to plugin rules if no rights to core rules

[charleneauger]

Hi,

If a profile does not have any rights to core rules, the rules of a plugin are no longer accessible.

The problem is easily reproducible with the OCSInventory-ng plugin.

Steps to reproduce the issue:

1. Put all rights on the rules of the OCS plugin
2. Remove all rights to core rules
3. The rules menu is no longer accessible, therefore no access to OCS rules

Best regards,
Charlene