ReportReader: fixed four Checkstyle issues (mvn checkstyle:checkstyle)

- Fixed four Checkstyle issues (after running "mvn checkstyle:checkstyle" and checking "target\checkstyle-result.xml").
- Spilt off part of the code of the createReportUnit method to the new handleQCPipelineDataFile method.
- Removed unused msrunName parameter from the checkDataFilesAvailability method.