Multi-node deployments with Experimental Neo4J Handler may duplicate object IDs

[ifadams]

Describe the bug
Multi-node deployments using the experimental Neo4J handler may duplicate object IDs, leading to data overwrites when under load

To Reproduce
Create a multi-node deployment behind a load-balancer (e.g. HAProxy)

Expected behavior
All deployments should create unique object IDs regardless of the data source

Additional context
We should probably move to a UUID based ID generation ASAP.