Add to the unit tests to test Library and Itemtype expansions as well as
linking multiple subfields of the same marc field to such expansions.
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 6b04e3e18f)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>