Make use of defaults in Fast add plugin

Purpose: To use the defaults from Settings (UIIN-1211) when creating a fast add record

User story statement(s):

As a circ staff user,
I want the fast add records I create to use the Suppress from discovery default from Settings
so that they they either are/aren't displayed in discovery per my organization's policy on fast adds

As a circ staff user,
I want the fast add records I create to use the Instance status default from Settings
so that my fast adds have a value that will enable them to be found later in Inventory so they can be dealt with (e.g. deleted, fully cataloged etc)

Scenarios:

1. Scenario:
   • Given the Suppress from discovery default in Settings > Inventory > Fast add
   • When I create a new Fast add record (from Check out, Inventory, Courses)
   • Then the Suppress from discovery checkbox will either be checked or unchecked according to the default specified (it should be possible to edit the value when creating the fast add)
2. Scenario:
   • Given the Instance status default in Settings > Inventory > Fast add
   • When I create a new Fast add record (from Check out, Inventory, Courses)
   • Then the Instance status menu will be populated according to the default specified (it should be possible to edit the value when creating the fast add)