Bug 21983: DB update

Bug 21983: DB update

This patch:
- Adds a illrequests.deleted_biblio_id column
- Adjusts existing db_rev so people upgrading have the biblio_id value
  moved to the also created column, before attempting to add the FK
  constraint on the biblios table.
- Adds a new db_rev for those who unfortunately already updated, it
  should be idempotent.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>