Bump log4j-core from 2.15.0 to 2.16.0

[venkat22]

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[cla-checker-service]

💚 CLA has been signed

[apmmachine]

❕ Build Aborted

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Build stats

• Reason: The PR is not allowed to run in the CI yet

• Start Time: 2021-12-14T04:07:51.502+0000

• Duration: 3 min 25 sec

• Commit: fab3988

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[apmmachine]

💔 Build Failed

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• Start Time: 2021-12-14T08:01:30.948+0000

• Duration: 3 min 8 sec

• Commit: fab3988

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Git fetch

• Took 0 min 5 sec . View more details here
• Description: git fetch https://${GIT_USERNAME}:${GIT_PASSWORD}@github.com/elastic/ecs-logging-java.git +refs/pull/*/head:refs/remotes/origin/pr/* > fetch.log 2>&1

Archive the artifacts

• Took 0 min 2 sec . View more details here
• Description: fetch.log

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)