Bug 11755: ensure that SearchOrders returns booksellerid

The SearchOrders routine should return the booksellerid and this
patch adds it.

This fixes several problems:

[1] The link to the vendor on the order receive page breadcrumbs
    was broken.
[2] The tax calculation in finishreceive.pl didn't run.
[3] The item booksellerid field never got updated during
    receipt.

Booksellerid was returned before bug 10723.

Quick test plan:
Go on orderreceive.pl and verify that the vendor link is correct.

Followed test plan. Vendor link is now correct.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>

C4/Acquisition.pm

@@ -1668,6 +1668,7 @@ sub SearchOrders {
                biblioitems.isbn,
                biblioitems.biblioitemnumber,
                aqbasket.authorisedby,
+               aqbasket.booksellerid,
                aqbasket.closedate,
                aqbasket.creationdate,
                aqbasket.basketname,

t/db_dependent/Acquisition.t

@@ -639,6 +639,7 @@ ok(
   datecancellationprinted
   budget_id
   authorisedby
+  booksellerid
 );
 
 # note that authorisedby was added to the return of SearchOrder by the
@@ -712,7 +713,6 @@ is( scalar (@$search_orders), 0, "SearchOrders with pending and ordered params g
 #
 # Test GetBudgetByOrderNumber
 #
-
 ok( GetBudgetByOrderNumber( $ordernumbers[0] )->{'budget_id'} eq $budgetid,
     "GetBudgetByOrderNumber returns expected budget" );