Bug 12395: Save order line's creator

Bug 12395: Save order line's creator

New MySQL column: aqorders.createdby

Creator's name is displayed on order's receive pages (acqui/orderreceive.pl
and acqui/parcel.pl)

On acqui/orderreceive.pl it replace the name of basket's creator
On acqui/parcel.pl, to avoid adding more data in the table of pending
orders, it is shown in a popup like MARC and Card views

Test plan:
1/ Run updatedatabase.pl
2/ Create a new order and go to the receipt page (acqui/parcel.pl)
3/ Click on "Order" link in column "More" (previously "View record")
4/ A javascript popup should appear with your name in it. Close the
popup.
5/ Click on "Receive" link
6/ Your name should appear in front of "Created by" label, to the right
of the page.

Patch updated with use of atomic update.

Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>