Migrate Elasticsearch example DAGs to new design

[potiuk]

There is a new design of system tests that was introduced by the AIP-47.

All current example dags need to be migrated and converted into system tests, so they can be run in the CI process automatically before releases.

This is an aggregated issue for all example DAGs related to Elasticsearch provider. It is created to track progress of their migration.

List of paths to example DAGs:

• airflow/providers/elasticsearch/example_dags/example_elasticsearch_query.py

[Bowrna]

@potiuk I will pick this up and try if i could fix it

[Bowrna]

@potiuk Could this be updated in the project too? https://github.com/apache/airflow/projects/15

[potiuk]

I did

[potiuk]

Ah ... automation was not set in the project - normally when issue is closed, it goes to Done automatically but it was disabled :)? Re-enabled it back

[Bowrna]

@potiuk Do i have to fix anything more to get this issue closed?

[potiuk]

It was automated checks - indeed it seems that the original test is not removed yet :)