* Chore: adds error handling to get requests in elasticsearch datasource

* Chore: updates elasticsearch datasource response parsing checks

* Chore: updates elasticsearch non-json errors description

* Chore: removes error catching from query methods to move it to the request method in elasticsearch

* Chore: fixes a typo in elastic response error message

* Chore: moves elasticsearch error handling to request method

* Chore: replaces datasource url in mock elasticsearch datasource