Backport r19239 from trunk

Backport r19239 from trunk

Acq: use the acqlimad table instead of its ancestor acqliad table to
populate a dropdown for the Export Single Attribute List function of lists
of lineitems

The acqliad table may appear to have duplicate entries since it's a parent, and
the point of the function that's trying to use it is just to export lists of
ISBNs or UPCs, so acqlimad is a better fit.

git-svn-id: svn://svn.open-ils.org/ILS/branches/rel_2_0@19240 dcc99617-32d9-48b4-a31d-7c20da2025e4