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).
This can also be used when you have a List with @OrderColumn for example.

As far as I understand it should always return a result but it is obtain by calling AbstractCollectionPersister#getIndexColumnNames() that returns a String[]

Maybe we are missing something? @emmanuelbernard ?