added missing option 'label_catalogue' for dashboard groups in di config

Setting the label_catalogue option for dashboard groups names is prepared in [DependencyInjection/Compiler/AddDependencyCallsCompilerPass.php#L98](https://github.com/sonata-project/SonataAdminBundle/blob/ca755ce878ff1104283ace6d7a307acd9ffa3e4e/DependencyInjection/Compiler/AddDependencyCallsCompilerPass.php#L98
) but you can't actually use it, because this option was missing in the DI configuration, so it always defaulted back to 'SonataAdminBundle'.

admin.yml snippet:
```php
dashboard:
    groups:
        sng_users:          { label: backend.group.users, label_catalogue: CatalogueName }
        sng_institutions:   { label: backend.group.institutions, label_catalogue: CatalogueName }
```