Description of changes:
Upgrade spring version to fix the security vulnerability. Also remove log4j from dependency as it's not being used and the 1.2 version has security vulnerability.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
Description of changes: Upgrade spring version to fix the security vulnerability. Also remove log4j from dependency as it's not being used and the 1.2 version has security vulnerability.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.