Include @group annotations in the report

We've tagged each tests with relevant groups. We'd like to filter/ categorise/ see test belonging to a group, together. I see that we don't pass group information to xmls. Can we add it as a feature?

```
/**
* Tests if this works
* @group Basic_Test
* @group Login
* @group Logout
*/
class ThisIsATest extends BaseTest {
}
```