Bug 29670: Fix EDI for AcqCreateItem = 'placing on order'

Bug 29670: Fix EDI for AcqCreateItem = 'placing on order'

The AcqCreatItem at order time functionality was broken by bug 27708.
This patch resolves that.

Test plan.
1) Run the newly created unit tests that prove both settings work

Signed-off-by: Jonathan Field <jonathan.field@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
(cherry picked from commit 960372b76ca0b42d8e22dde445402f4c9ba523dc)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
(cherry picked from commit bda8299669d1a34a32fe45f6f765133a0f54f22a)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>