Please make this class compliant with [AbstractCheck::setLabel() and getLabel()](https://github.com/frne/ZendDiagnostics/blob/file_validation_test/src/ZendDiagnostics/Check/AbstractCheck.php?pr=%2Fzendframework%2FZendDiagnostics%2Fpull%2F38#L51).

The idea is for users to be able to provide their own labels which will then be used in reporters. Because you're overriding `getLabel()` in your classes, this functionality would not work (users would not see labels they've assigned to checks).