Bug 14781: Creation of barcode types 2of5 not functional

Bug 14781: Creation of barcode types 2of5 not functional

This patch fixes the rendering of "COOP2of5" or "Industrial2of5" barcodes in the label creator module.

To test:
- Create a label layout with COOP2of5 barcode type
- Create labels (make sure that the items's barcode values are numeric only!)
- Export batch and download PDF.

Without patch:
- No barcodes rendered
With patch
- Barcodes should render as expected. Test for both barcode types.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Works as described, tested both formats.
Non digit barcode is not printed.

No koha-qa errors, no t/ & xt/ errors

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Note: To be printed, barcode should be numerical.
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>