Use SteveConfiguration as Spring component

[juherr]

Goal: Avoid global variable and inject instance everywhere needed.

Extra:

• Extract UnknownChargePointService in order to remove the dependency cycle.
• Prefer constructor injection instead of field injection when a class was modified

[juherr]

Ping @goekay wdyt?

[juherr]

Ping @goekay

[goekay]

this is hard for me to review as there are too many changes in this PR, but also in one commit. can you split it to multiple PRs, or at least multiple commits?

regarding the constructor injection: i would welcome it in conjunction with Lombok to reduce constructor ceremony using @RequiredArgsConstructor. moreover, i see you did not make the changes in all classes. may i ask the reason?

thanks for the effort!

[juherr]

moreover, i see you did not make the changes in all classes. may i ask the reason?

Because it was not the purpose of the pull request.
I've just modified classes that were impacted by the change.

As asked: #1226

[juherr]

this is hard for me to review as there are too many changes in this PR

Even if I rebase onto #1226, I'm not sure the change will be really shorter because the steve configuration global variable is used deep in the object graph.