Default number of ACQ copies per provider

Acquisitions providers have a new "Default # Copies" field.  When the value
is set, this number of copies will be automatically added to each lineitem
added to a purchase order for the provider.  This takes place during PO
creation from a selection list or existing bib record and when a lineitem is
added to an existing purchase order.  If a lineitem already has copies
attached, no default copies are added.

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Default ACQ copies use workstation org as owning lib

When creating default copies for new lineitems or lineitems added to
POs, use the workstation org unit as the owning lib for each copy.  With
this, it's possible to order items for "here" without having to edit any
single copies.  This also resolves a confusing issue where opening the
copies in the copies grid made it appear that each copy had an
owning_lib applied (via the autofieldwidget) when none was yet set.

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Kathy Lussier <klussier@masslnc.org>
lp1110538: DB upgrade; default provider copies

Signed-off-by: Bill Erickson <berick@esilibrary.com>