[jmx-scraper] Create weaver model for jmx-scraper metrics #2072

[mcmho]

Description:
Feature / Improvement: use weaver model to describe metrics so that they can be standardized.

• created metrics.yaml weaver model for jvm metrics
• created attriutes.yaml
• tested with weaver registry generate

Testing:

• tested with weaver registry generate; metadata.yaml is successfully generated and content is valided

Documentation:

• customer facing docs not yet needed

Outstanding items:

• once this looks good, there will be other models to work on for other target systems.

[atoulme]

LGTM - please look at the CI?

[SylvainJuge]

I am not familiar with weaver, does it means that the jmx scraper yaml configuration would be now generated from registry+template ? Maybe we could modify the yaml format to make this easier or even avoid having to use a template.

Do you have an high level overview of what this change helps to achieve?

Also, the metrics descriptions are part of what is being tested in unit tests, so when changing them you'll have to update the test code as well.