Bug 20972: Add a testcase for bug 20972

Bug 20972: Add a testcase for bug 20972

Ensure all 10 characters of ISBN are preserved

And that ISBNs and EANs are correctly identidied in the PIA segment

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 82ce10dd2817e99aa138d87287d903e5c7539a0a)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit e2fbce6c719eaa4dbfffe0eb7ed0dd6a142df96d)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>