Bug 33404: Fix serverhost and init $page

Bug 33404: Fix serverhost and init $page

The array serverhost is not filled. Should be replaced with values
from servers array.

Test plan:
Nothing exciting here. Read the patch.
Note that we will test in the next patch if the hostname is saved
correctly in the import batch.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>