[Fix] Resolve Spark configuration update issues

[lenoxzhao]

Brief change log

1. Changed kill() to stop() for app cancelling.
2. Supplied template configuration updating function.

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

Does this pull request potentially affect one of the following parts

• Dependencies (does it add or upgrade a dependency): (yes / no)

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud