CAMEL-19359: camel-spring - Graceful shutdown in Spring Boot better s…

[davsclaus]

…upported. Changed the shutdown phase in SpringCamelContext to be a bit later.

Description

Target

• I checked that the commit is targeting the correct branch (note that Camel 3 uses camel-3.x, whereas Camel 4 uses the main branch)

Tracking

• If this is a large change, bug fix, or code improvement, I checked there is a JIRA issue filed for the change (usually before you start working on it).

Apache Camel coding standards and style

• I checked that each commit in the pull request has a meaningful subject line and body.

• I formatted the code using mvn -Pformat,fastinstall install && mvn -Psourcecheck

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[github-actions]

Components tested:

Total	Tested	Failed ❌	Passed ✅
1	1	0	1

[davsclaus]

I would like to test a bit more if 65537 is too much, the core services in SB are using - 1024 and -2048, there may be some stuff that are closer to these numbers that we need Camel to stop beforehand.

[github-actions]

Components tested:

Total	Tested	Failed ❌	Passed ✅
2	2	0	2