Bug 1064616: If a 'try' repo do not show 'unclassified failures in last 24 hours'

I think the right check there should be
```javascript
scope.repoData.repository_group.name === "try"
```
because you could have a repository without try in the name belonging to the try repository group. See https://treeherder.mozilla.org/api/repository/ for the data structure associated to a repository.