Bug 36473: Handle Invalid Metadata Exceptions in totalissues.pl

Bug 36473: Handle Invalid Metadata Exceptions in totalissues.pl

This patch wraps the call for record in an eval, and catches any invalid metadata
exceptions, letting the warning show, but allowing the script to continue
To test:
1 - In default KTD record 369 has problems, otherwise you need to break a record
2 - Run : misc/cronjobs/update_totalissues.pl --use-stats --commit=1000 -v
3 - It dies at record 369 (or the one you broke)
4 - Apply patch
5 - Run again
6 - It succeeds, but skips the bad record

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>