Update to elastic/beats@d16ecc9c891f, Go 1.14.4

[axw]

Motivation/summary

Update to elastic/beats@d16ecc9c891f
Update to Go 1.14.4, as updated by Beats

Checklist

• I have signed the Contributor License Agreement.
• I have updated CHANGELOG.asciidoc

I have considered changes for:
- [ ] documentation
- [ ] logging (add log lines, choose appropriate log selector, etc.)
- [ ] metrics and monitoring (create issue for Kibana team to add metrics to visualizations, e.g. Kibana#44001)
- [ ] automated tests (add tests for the code changes, all unit tests pass locally)
- [ ] telemetry
- [ ] Elasticsearch Service (https://cloud.elastic.co)
- [ ] Elastic Cloud Enterprise (https://www.elastic.co/products/ece)
- [ ] Elastic Cloud on Kubernetes (https://www.elastic.co/elastic-cloud-kubernetes)

How to test these changes

make test

Related issues

Closes #3908

[axw]

Needs #3962 and elastic/beats#19821

[apmmachine]

💚 Build Succeeded

Expand to view the summary

Build stats

• Build Cause: [Pull request #3961 updated]

• Start Time: 2020-07-14T03:21:41.990+0000

• Duration: 46 min 21 sec

Test stats 🧪

Test	Results
Failed	0
Passed	3216
Skipped	152
Total	3368

Steps errors

Expand to view the steps failures

• Name: Compress

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

  • Duration: 0 min 0 sec

  • Start Time: 2020-07-14T03:36:16.216+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: 2020-07-14T03:48:30.940+0000

  • log