OGM-548 Remove redundant properties from relationships in Neo4j

https://hibernate.atlassian.net/browse/OGM-548

This pull requests will remove the TEMP nodes, the redundant properties on the relationship for associations and collection of embedded.

I had to add some values on the AssociationKey and the AssociationContext to achieve this.

Note that it won't affect the additional properties on OneToOne and it won't create a separtate node for an embedded attribute (There are separate issuesfor this).
I'm wondering whether we couldn't do this logic actually in `updateAssociation()`? For all the other dialects, `createTupleAssociation()` just returns `new Tuple()` and I'm in fact wondering whether it needs to be an operation on `GridDialect` at all. Any thoughts? @emmanuelbernard?