JCypher thread safe ResultSettings flag and jdk17 compatibility

[mpetris]

Hi Wolfgang,

this pull requests includes the following topics:

• the ResultSettings flag is now thread safe, I tried to follow your style here
• the ResultSettings flag is now checked also when working on fields of nodes and not just with nodes
• JDK 1.7 compatibility

I'm not sure if you deliberately moved to JDK 1.8. I could understand that. But since your changes that need 1.8 are very small and I'm still stuck with 1.7, I put 1.7 compatibility back in.

Thanks for considering my changes.

Best, Marco

[Wolfgang-Schuetzelhofer]

Hi Marco, I have merged your pull request.

Thanks for your contribution, best regards, Wolfgang