Bug 8413 Space in barcodes breaks GET request in benchmark_staff.pl

Bug 8413 Space in barcodes breaks GET request in benchmark_staff.pl

GET requests in benchmark_staff.pl test 6 do not work if a space character is part of the barcode. That seems highly unlikely to happen in barcodes, but is possible if no real barcodes are used but a substitute, like a copy of the call number. Space character needs to be changed to %20 for the request to work.

Also fixes a typo.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>