Bug 10243: prevent holds queue from making transfer requests that contradict library...

Bug 10243: prevent holds queue from making transfer requests that contradict library holds policy

For some reason MapItemsToHoldRequests will, as a last ditch effort,
grab what seems to be an arbitrary available item to fill a hold request,
even if it will violate the circulation rules for holds.

In other words, even if an item matches a "Holds policy by item type"
that says "From home library", a request to transfer that item to
another library will be added to the holds queue!

Test Plan:
1) Create a record with a an item at BranchA of item type BOOK
2) Set the holds policy such that itemtype BOOK for BranchA is set
   to "From home library"
3) Place a bib-level hold request for a patron with a pickup at BranchB
4) Run build_holds_queue.pl
5) You should now see a request for that item to be transfered to
   BranchB, even though the rules should not allow this.
6) Apply this patch
7) Run build_holds_queue.pl again
8) View the holds queue again, that request should no longer exist

Signed-off-by: Heather Braum <hbraum@nekls.org>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>