I see that there's not much reference to test groups in general

However for testing proposes it would be interesting to use, something like:
```
/**
 * Test case for language issues in EZP-20018
 *
 * @issue EZP-20018
 * @group RepositoryTest
 * @group RegressionTest
 * @group ezp20018Test
 * @group ezp20018LanguageTest
 */
class EZP20018LanguageTest extends BaseTest
```
This way we could execute them through groups, and not execute the all process or one by one