Update beats framework

[simitt]

Motivation/summary

Update beats framework and pull in changes for the generate_notice.py script from https://github.com/elastic/apm-server/pull/3909/files#diff-bdaf0a575568af2fcf667ae3e322b7db.

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: [Pull request #3924 opened]

• Start Time: 2020-06-30T14:24:18.436+0000

• Duration: 27 min 23 sec

Test stats 🧪

Test	Results
Failed	0
Passed	2997
Skipped	143
Total	3140

Steps errors

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• Name: Compress

  • Description: tar --exclude=coverage-files.tgz -czf coverage-files.tgz coverage

  • Duration: 0 min 0 sec

  • Start Time: 2020-06-30T14:39:55.278+0000

  • log

• Name: Compress

  • Description: tar --exclude=system-tests-linux-files.tgz -czf system-tests-linux-files.tgz system-tests

  • Duration: 0 min 0 sec

  • Start Time: 2020-06-30T14:51:38.950+0000

  • log

• Name: Test Sync

  • Description: ./script/jenkins/sync.sh

  • Duration: 2 min 27 sec

  • Start Time: 2020-06-30T14:35:58.120+0000

  • log