Upgrade Java Quickstarters to Java 17 and Springboot 3.x

[amardeep2006]

Describe the feature

I noticed that Java examples can be improved by making following changes:

1. Use Java 17 as baseline in ReadME
2. Upgrade example to use Springboot 3.x.x
3. Use Java records instead of Lombok . One less dependency to manage. (In future)
4. Start adding test cases (gradually) .

Please share your feedback on this. I am interested in sending PR if you are good with these suggestions.

[amardeep2006]

I have raised a PR #1044

1. Java Readme now correctly asks to use Java 17 as code base already needed Java17
2. Upgraded springboot t 3.3.1
3. Bumped up other dependencies as well.

I have not replaced Lombok . Will raise separate PR if needed.

[msfussell]

Closing this issue. @amardeep2006 THANK YOU for this amazing contribution!