Bug 7363: allows downloading of lists in CSV format

Bug 7363: allows downloading of lists in CSV format

Getting a list in CSV format was impossible because the
shelfid parameter was empty in the URL.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit 5641b90b63e43f2c4eee026c5dc77f6398232872)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>
(cherry picked from commit a78f3d15a19b22632b683c81a4bde9eb43ef012f)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>