Bug 28881: (bug 23376 follow-up) Fix suggestion display on order receive page

Bug 28881: (bug 23376 follow-up) Fix suggestion display on order receive page

On bug 23376 we replaced $order, from hashref Koha::Acq::Order, but 2
occurrences have not been corrected.

It causes a bug on the order receive page when the bib is linked with a
suggestion.

Test plan:
Create an order from bib A, create a suggestion for purchase on bib A
(OPAC)
Receive the order.
Without the patch: Notice the "Suggested by: (suggestion #)"
With the patch you see the info of the suggester

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>