QZXingTests - The Tests should detect the Barcode format as well

[maheshdev305]

void DecodeValidator::executeTests(const QString &folderPath) {
...
    QZXing::DecoderFormat decoderFormat = getDecoderForFolder(subfolderName);
...
}

Instead of determining the decoder format based on the folder name, it should just loop through the folders & images and report the decoded barcode type & data.

[maheshdev305]

Tests has been updated and can be viewed in PR 219