#1190 handle errors from response in search-ui-elasticsearch-connector

[lluisemper]

Before submitting this PR:

1. Make sure you are PR'ing from a fork, please do not push branches directly
   to this repository.
2. Ensure you've written sufficient tests for your work.
3. Double check that your changes will not break existing connectors (if
   applicable).
4. Double check that your changes do not break the react-search-ui-views
   storybook (if applicable).

Description

Handle api error in ElasticsearchAPIConnector

List of changes

If an error is found, throw it instead of failing silently.

Associated Github Issues

#1190