Bug 12944: Search orders by basket creator

Bug 12944: Search orders by basket creator

This patch adds the ability to search orders using the basket creator.

Test plan:
- go on the order advanced search form (acqui/histsearch.pl)
- use the autocomplete input to search patrons
- launch the search and verify the results are consistent with the
  values you have filled.

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>