Bug 33489: Add indices to default patron search fields

Bug 33489: Add indices to default patron search fields

This patch adds indices to the borrowers table to match the default
search fields for patrons.

To test:
1 - Apply patch
2 - Update database
3 - Ensure patron searching works as before

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 1faf3bcf2a59f8e6a48a2b101d78d35843bf41dd)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>