LP1525394 SIP patron part level holds respond blank

LP1525394 SIP patron part level holds respond blank

Added code to flesh part level hold information in SIP/Patron.pm
In order to test this, you will need to identify a patron who has
a part level hold. Query SIP with a 63 message like:

6300120151211    104201     Y    AOhidden|AApatronbarcode|AC|AY1AZF08D

and the server should respond with the title in the |CD field for that
part level hold.

Signed-off-by: blake <blake@mobiusconsortium.org>
Signed-off-by: Jason Boyer <jboyer@equinoxinitiative.org>
Signed-off-by: Bill Erickson <berickxx@gmail.com>