Bug 16522: (follow-up) Rename "Host item entry" to "In"

Bug 16522: (follow-up) Rename "Host item entry" to "In"

We already use In: as label for 773 on the result lists and
detail pages and it's also recommended in the MARC documentation.
With this patch the label is the same everywhere.

Signed-off-by: Heather Hernandez <heather_hernandez@nps.gov>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit ec48907e23441648233eac2167ad4a1759b4c765)
Signed-off-by: Jacob O'Mara <jacob.omara@ptfs-europe.com>