[BUG] Leftover references to Elasticsearch

[dblock]

What is the bug?

We have a ton of Elasticsearch references in code, https://github.com/opensearch-project/spring-data-opensearch/search?q=Elasticsearch. What's the plan to deprecate those in favor of OpenSearch?

What is the expected behavior?

All "elasticsearch" becomes "opensearch".

[reta]

@dblock large chunk of them is expectable: we do rely on Spring Data Elasticsearch and as such, many classes / inrteraces / beans contain Elasticsearch in their names, no much we can do about it sadly (but there could be some leftovers indeed).

[dblock]

Can our own code, such as this package, move from org.springframework.data.elasticsearch.core to an 'opensearch' namespace?

[reta]

Can our own code, such as this package, move from org.springframework.data.elasticsearch.core to an 'opensearch' namespace?

The org.springframework.data.elasticsearch.core (under test only) is 1:1 copy of the spring-data-elasticsearch test scaffolding, technically we can move it under our own package, I have mentioned it here #1 (comment)