Bug 30287: (follow-up) Make unit test more reliable in ktd

Bug 30287: (follow-up) Make unit test more reliable in ktd

This patch mocks NoticeCSS earlier to ensure we're not inadvertantly
failing due to a local setup in ktd having added to the preference.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 12e90c8b7d08a927c5fbc2c07792f78d6880cde2)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 52772da921c9ad71abcbaab7223b60f5a9ac48de)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>