Update Neo4j extension to use Java 17 and Spring Data Neo4j

[meistermeier]

This is a rather large PR because it will remove the Neo4j-OGM dependency and replace it with the Spring Data Neo4j.

Some background information to clarify the situation:
The official Spring Data Neo4j was rewritten a few years ago to not depend on Neo4j-OGM anymore (in Spring Boot version since 2.4).
This current (old) implementation is based on the fact that the Spring Boot starter still brings Neo4j-OGM as a dependency and makes use of the configured SessionFactory instance, that does not exist anymore.

Pros: No need to specify the query parts anymore but only one query/statement based on the Neo4j Cypher-DSL (https://github.com/neo4j-contrib/cypher-dsl) for readers
Cons: The writer needs now, instead of the single SessionFactory,

• the Neo4jMappingContext to have knowledge about the entities
• the Neo4jTemplate for loading and mapping entities
• the (Neo4j)Driver for the simple delete operations.

While changing the mapping layer component, I decided also to upgrade all other dependencies to latest.

[michael-simons]

That should go together with the following sentence.

x, y, z are needed and b must be excluded. See the following gradle for a minimal example,

[mbollemeijer]

Is there any ETA on when this will be merged ?

[michael-simons]

I cannot neither make an assumption on it, nor merge it myself.

[meistermeier]

If there is demand to get this in, I would like to get some feedback from @mdeinum or @dgray16 here (at least they seem pretty active in the past).
No problem for me to check possible upgrades and apply some needed adjustments before merge.

If this is up to us alone, I am technical able to do the merge, but please let us know.

[dgray16]

I did not have a chance to work with Neo4j so I cannot add a proper review for the logic, but dropping you some general ideas.

Also it would be great to have integration tests with Testcotainers.

Anyway LGTM. Thanks for your efforts!

[meistermeier]

Thanks for your input, @dgray16
I added the suggested changes. Don't have any preferences of whitespace formatting, so I adjusted it to spaces 😃
Would be nice to get a last sanity check on this. I am happy to squash and merge it later.