KRACOEUS_8105_1: filtered roles from access role drop down

the service this finder uses already does the following:

```
    public List<Role> getRolesForDisplay() {
        return systemAuthorizationService.getRolesByType(RoleConstants.PROPOSAL_ROLE_TYPE, DocumentAccessConstants.DOC_LEVEL_KIM_TYPE_NAME, DocumentAccessConstants.DOC_LEVEL_KIM_TYPE_NAMESPACE);
    }
```