Bug 7454 Initialize return arrays in ILS/Transaction/RenewAll

Bug 7454 Initialize return arrays in ILS/Transaction/RenewAll

Explicitly clear these arrays and update them directly.
In practice item numbers were already in them when called
so that more items were being returned than were actually
renewed (or failed)

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Functionally sound patch, and tested in production

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>