Dynamic logger ecs reconfig

[eyalkoren]

What does this PR do?

Checklist

• This is an enhancement of existing features, or a new feature in existing plugins
  • I have updated CHANGELOG.asciidoc
  • I have added tests that prove my fix is effective or that my feature works
  • Added an API method or config option? Document in which version this will be introduced
  • I have made corresponding changes to the documentation
• This is a bugfix
  • I have updated CHANGELOG.asciidoc
  • I have added tests that would fail without this fix
• This is a new plugin
  • I have updated CHANGELOG.asciidoc
  • My code follows the style guidelines of this project
  • I have made corresponding changes to the documentation
  • I have added tests that prove my fix is effective or that my feature works
  • New and existing unit tests pass locally with my changes
  • I have updated supported-technologies.asciidoc
  • I have added information to the Log correlation documentation
  • Added an API method or config option? Document in which version this will be introduced
  • Added an instrumentation plugin? Describe how you made sure that old, non-supported versions are not instrumented by accident.
• This is something else
  • I have updated CHANGELOG.asciidoc

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• Build Cause: Started by user eyalkoren

• Start Time: 2021-03-17T17:55:36.993+0000

• Duration: 50 min 19 sec

• Commit: d4622aa

Test stats 🧪

Test	Results
Failed	0
Passed	1883
Skipped	15
Total	1898

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Test stats 🧪

Test	Results
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Passed	1883
Skipped	15
Total	1898

[felixbarny]

I know this is not ready yet but I was too curious about this PR :)

[felixbarny]

We might have to refine how the service.name is computed but let's not block this PR on that. It's an experimental feature anyway.