Documentation Update: Disabling Elasticsearch for an operation

[ndy40]

If you have added Elasticsearch to your project and later remove it or prefer to fetch the data from the database rather than from Elasticsearch, you can achieve this by adding the parameter elasticsearch: false to your operation. This forces the api endpoint to query the database instead of Elasticsearch for your data.

Issue isn't visible in the documentation and cost us 2 days of investigating to figure it out.

[ndy40]

@soyuka thanks for the suggestion. Merged the suggestion.