Reduce using `System.exit`

[pj892031]

Describe the bug The code of APIML contains about 10 calls of System.exit. It is not a best practice and can lead to issues (ie. https://github.com/zowe/api-layer/pull/2923#discussion_r1212887630).

The code should be replaced at least with SpringApplication.exit (https://www.baeldung.com/spring-boot-shutdown#exit)

Expected behavior Code does not contains any directly call of System.exit

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[pj892031]

I am sure this issue is still valid and shouldn't be closed.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[pj892031]

It is still valid.