Grails 2: Logging configuration: lack of smart completion

**Config.groovy**
- log4j{..} - completion is provided only for "info" and "error" logging levels (see [http://docs.grails.org/2.5.5/guide/conf.html](http://docs.grails.org/2.5.5/guide/conf.html))
- there's no completion for standard application artifact names in strings like, for example
```
log4j{
...
info "grails.app.controllers"
...
}
```

---

*Imported from [IDEA-167747](https://youtrack.jetbrains.com/issue/IDEA-167747) · Type: Feature · Votes: 0*
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Start by examining Config.groovy logging configuration and the linked Grails 2.5.5 configuration documentation. Check how completion currently handles log4j logging levels and determine where standard application artifact names in strings such as "grails.app.controllers" are represented. Done means both standard levels and artifact names receive smart completion in the relevant log4j configuration.

Written by the indexing model from the issue text.