Mihails Krasilnikovs

Get default values from index setting api

2

### Problem: I need to retrieve index settings like 'max_result_window' but in the response body default value is not returned, in order to fetch the default value need to add...

In this commit, https://github.com/symfony/maker-bundle/commit/4da6e4a9615c8a32bae48630626ca7dac2af06a0 was removed import related to `LegacyApiTestCase` but `MakerTest` class still use `LegacyApiTestCase::class` as a result generated API test case class with incorrect import. `use Symfony\Bundle\MakerBundle\Maker\LegacyApiTestCase;`