Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Enable partioning
2. Create 2 partitions
3. On the first partition POST a bundle with a patient with an identifier: (system: acme, value: 123) with an ifNotExists of identifier=acme|123
4. POST the same bundle but on the second partition
5. See error: HAPI-0550: could not execute batch [Unique index or primary key violation: "PUBLIC.PRIMARY_KEY_3 ON PUBLIC.HFJ_RES_SEARCH_URL

Expected behavior
The second bundle should insert correctly and both resources should be able to coexist on different partitions.

Environment (please complete the following information):

• HAPI FHIR Version: Master

Additional context
This behaviour should be configurable to users can either opt in or out of supporting resources with duplicate identifiers across partitions.