Spring Boot 3 review

[PhilWakelin]

Update prereqs to CICS TS 6.1
Fix build.gradle
Remove duplication
Update MAINTAINERS

[IvanHargreaves]

Mostly all good changes. I should have spotted most of these, I guess I was focused on what changed, not what hadn't changed that should!

The one change we do want to retain is the bootWAR false though. That's a good thing, we have no use for the larger executable, just use the plain WAR instead.

[PhilWakelin]

The one change we do want to retain is the bootWAR false though. That's a good thing, we have no use for the larger executable, just use the plain WAR instead.

PR updated with instructions to use the gradle build task to avoid bootWar build, and with Maven build spring-boot.repackage.skip property.

[IvanHargreaves]

Something I should have spotted before, even though Spring Boot 3 works with the Jakarta EE 9 libraries, I think the official base-line is Java 17 and Jakarta EE 10.

So we'll probably need to put Jakarta EE 10 and Servlet-6.0 in the pre-reqs and sample.