Bug 25030: (QA follow-up) Fix tests

Bug 25030: (QA follow-up) Fix tests

Fluid is not a valid value for cxn_pool - valid values are:
Sniff,Static,NoPing

AddAuthority call calls index - the indexing call was trying to access
the ES server with mocked values and dying when they were invalid

This patch uses a correct value for cxn_pool and inserts directly into DB
to avoid indexing

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit e559c868dcbde7dac52dcda2bd73a4124770691c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>