[MCHECKSTYLE-422] Print absolute paths

**[Delany](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=delany)** opened **[MCHECKSTYLE-422](https://issues.apache.org/jira/browse/MCHECKSTYLE-422?redirect=false)** and commented

When the check goal prints a violation to the console it gives the relative path

```
[ERROR] src/main/java/...
```

Off the top of my head all other plugins give absolute paths.

Absolute paths are necessary when running the build in IntelliJ's terminal. An absolute path is recognized as such and one can simply click it to open the file.

---

**Affects:** 3.2.0

Start at the check goal's violation output, which currently prints relative paths. Trace how the reported file path reaches the console and change the output to an absolute path; verify that the resulting path can be opened from IntelliJ's terminal.

Written by the indexing model from the issue text.