[receiver/elasticsearch] Add integration test

[djaglowski]

It should be possible to add a containerized integration test to this receiver.

[Frapschen]

hi, l'd to help it, how can I start? any example?

[dmitryax]

@Frapschen Ok, assigned to you

[BinaryFissionGames]

Hey @Frapschen, thanks for volunteering to help out.

The task is essentially to create an integration test that:

1. Starts an elasticsearch docker container
2. Initializes the elasticsearchreceiver component from it's factory
3. Scrapes metrics from the docker container
4. Validates that the expected metrics are scraped (using the scrapertest package)

As far as examples go, there are a few components out there that have integration tests using the same pattern.
For instance:

Mysql receiver integration test
Nginx receiver integration test

[Frapschen]

ok, I wil check these pattern and work on the es one.

[Frapschen]

follow the Mysql receiver integration test,I start up an es container and Initializes the elasticsearchreceiver, everthing is look good except I get nil value of actualMtrics.orig.ResourceMetrics.

[djaglowski]

Closed by #10361