update query for Elasticsearch 7.x

[inggilove]

With Elasticsearch 7.x or Open Distro for Elasticsearch 1.x,
Invalid query parameter is updated

[susodapop]

Thanks!

[susodapop]

Can you link any documentation about this change? I don't see it mentioned in the breaking changes doc for v7. And we don't have an ES instance to test against.

[inggilove]

Thanks for your review.
It was a mistake to the version of 'Elasticsearch 6.0 or older'
Actually the parameter 'fields' is deprecated from Elasticsearch 5.0, so some text have to be changed...

I attached the reference blog:

(1) Change Info ( Elasticsearch v5.0 )
https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking_50_search_changes.html#_search_shard_limit

(2) Elasticsearch Sample
Latest v7.x : https://www.elastic.co/guide/en/elasticsearch/reference/7.x/search-fields.html#stored-fields
v5.0 : https://www.elastic.co/guide/en/elasticsearch/reference/5.0/search-request-stored-fields.html

[inggilove]

Older version changes like 'fields', 'limit' are removed because Elasticsearch 2.x looks too older compared to Elasticsearch 7.x.