Spring : custom demo, upgrades, adding prepared query

[tarzanek]

No description provided.

[tarzanek]

@guy9 and I noticed I didn't push the changes for last update of Spring app yet, fixing my backlog

[guy9]

Thanks @tarzanek . There is a lesson that uses the existing example , and I don't want it to break.
Can you add this as a new example (say in a new directory) instead of changing the existing one?

[tarzanek]

@guy9 this change is fully backwards compatible, what worked before, still works
it also aligns to jdk 17
the only new thing is a prepared query for implementation of get by ID (as it should be)

I verified the lessons, fixed the postman example and version of binary to match it
so this PR should be safe to merge

[guy9]

LGTM